From d9a824ca9e7f9d16d9d5f637c11f19f97f6e0d08 Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 15:05:01 -0700
Subject: [PATCH 01/11] Upgrade TypeScript engine shipped with API Extractor

---
 apps/api-extractor/package.json   |   2 +-
 common/config/rush/pnpm-lock.yaml | 151 +++++++++++++++---------------
 2 files changed, 77 insertions(+), 76 deletions(-)

diff --git a/apps/api-extractor/package.json b/apps/api-extractor/package.json
index a203164decd..6f5d926cb54 100644
--- a/apps/api-extractor/package.json
+++ b/apps/api-extractor/package.json
@@ -40,7 +40,7 @@
     "lodash": "~4.17.15",
     "resolve": "~1.17.0",
     "source-map": "~0.6.1",
-    "typescript": "~3.7.2"
+    "typescript": "~3.9.5"
   },
   "devDependencies": {
     "@microsoft/node-library-build": "6.4.10",
diff --git a/common/config/rush/pnpm-lock.yaml b/common/config/rush/pnpm-lock.yaml
index 5655609587b..90015a8fd7a 100644
--- a/common/config/rush/pnpm-lock.yaml
+++ b/common/config/rush/pnpm-lock.yaml
@@ -14210,7 +14210,7 @@ packages:
     dev: false
     name: '@rush-temp/api-documenter-test'
     resolution:
-      integrity: sha512-xPShjp3CMqTNozpd0NQ7gszqAyFosMF30f7CXeVhG8uchtKyCTRxCWCSTybLNT7FZyYFgQ6IgzJYk8ZDPCPP2Q==
+      integrity: sha512-oSQHe/WAGn2pGDzHNxy/ebbHwgV5EkUiaHoDC5mFveZi/YbZt8DfhcFzCAIzP/7M19h4bhhD9dkmDencC/4Q/A==
       tarball: 'file:projects/api-documenter-test.tgz'
     version: 0.0.0
   'file:projects/api-documenter.tgz':
@@ -14228,7 +14228,7 @@ packages:
     dev: false
     name: '@rush-temp/api-documenter'
     resolution:
-      integrity: sha512-zZAUZWVAnR5l55npmqTmaJGdxA5c2mANCAjX/0063z3BYwjRAoeyFE4zWMzIal0QoGDwnV6l35P0NR448U4jBQ==
+      integrity: sha512-NP2auGxTmo90sgiJQaYfXT7rAr6LM//a9D2cwZOC8ll0AZrI1Zj7mkLiqGQzEkZ0E0qVqoM2RHbl4AeJqq4XOg==
       tarball: 'file:projects/api-documenter.tgz'
     version: 0.0.0
   'file:projects/api-extractor-lib1-test.tgz':
@@ -14239,7 +14239,7 @@ packages:
     dev: false
     name: '@rush-temp/api-extractor-lib1-test'
     resolution:
-      integrity: sha512-gi8v35mfZ1UjiRMMVrfqEvqWTlzwFk0+ShIsuznGPFXHQho0k7WLJXK1/PL9dG6Lud+pfwFtT18LKESMi+gvHw==
+      integrity: sha512-j4cGvRknTDXwBbM7rx7X+V62UfeTK9kAGkSpT3GpaZrRTwbtZhzPWyqY9lzw6tN43xlX/Iuc1g4FmnVDe1lqWA==
       tarball: 'file:projects/api-extractor-lib1-test.tgz'
     version: 0.0.0
   'file:projects/api-extractor-lib2-test.tgz':
@@ -14251,7 +14251,7 @@ packages:
     dev: false
     name: '@rush-temp/api-extractor-lib2-test'
     resolution:
-      integrity: sha512-IyG00gC1rU0u25g9CcxtzoxGAZOd271AXBjfyyBU6iXb4a1GTBafsDhmC6CyjeIe4IMi0jzmwjkevBGV4SYVAw==
+      integrity: sha512-d/guVZZpVbV7X0N8WYQfltz0frTUO/Al4vq73fb9AF22TcWTmA+lFxlc7bMuXi/UZNtmpkH/kJ27YCSbeCuMkg==
       tarball: 'file:projects/api-extractor-lib2-test.tgz'
     version: 0.0.0
   'file:projects/api-extractor-lib3-test.tgz':
@@ -14263,7 +14263,7 @@ packages:
     dev: false
     name: '@rush-temp/api-extractor-lib3-test'
     resolution:
-      integrity: sha512-qWYKmJAZMWzI5Lya19W4LflIxStoHG7gHZHWTIscAL8TSqy+d/PTZh2Ecea4PnB8vgPiRzGryae1m6cRv714tQ==
+      integrity: sha512-B3J22QVJJC5kWnBLgDh6XjcwyEwwFRKvdA43oi1wPCvlqLW6RTrH8YA2SJVAMNf3rVSYWJHnFpwekfeGuqJ0Kg==
       tarball: 'file:projects/api-extractor-lib3-test.tgz'
     version: 0.0.0
   'file:projects/api-extractor-model.tgz':
@@ -14277,7 +14277,7 @@ packages:
     dev: false
     name: '@rush-temp/api-extractor-model'
     resolution:
-      integrity: sha512-uFOBdEdczwM8LEOJ1KOKL4KePdBiK/ttx19crBxcCW4nEQb1/Or8/CXj1mkcZvrepI/d/PHUSS2Kx+6YSwggTA==
+      integrity: sha512-95livdaJE9QL2skP3yC8c+7rU6JIWBK+satYaGNMs9wSe6ls3thHy8l9w07Y2fyNdyoO2/ETvmFU8r/Dgm1aMQ==
       tarball: 'file:projects/api-extractor-model.tgz'
     version: 0.0.0
   'file:projects/api-extractor-scenarios.tgz':
@@ -14291,7 +14291,7 @@ packages:
     dev: false
     name: '@rush-temp/api-extractor-scenarios'
     resolution:
-      integrity: sha512-z6z6d06x4oGbWUh/k/eK90f7NcfbF4VmejAUZtekcCRg0QZdRTPmAkLmyHWzsz8vgl550XdojFPPXNWz8MR7oA==
+      integrity: sha512-dioxOVTQZgT+tuCvtcottdkiVTOvej/eLPIiz+W+vp71jbjzComxaKwxXokzw3XmvqIiW/HJajG55q+B0O+WDw==
       tarball: 'file:projects/api-extractor-scenarios.tgz'
     version: 0.0.0
   'file:projects/api-extractor-test-01.tgz':
@@ -14305,7 +14305,7 @@ packages:
     dev: false
     name: '@rush-temp/api-extractor-test-01'
     resolution:
-      integrity: sha512-gOjcaQLOaF/QOdFTRwAHSBCF3ybI7+oIqk6Rd0JtEtGO4BcPSqwnLHD9LX+zD3uGEWJziRs0BgeafQzWiZZOwQ==
+      integrity: sha512-gRBxDF1RjKcabsNcInRgWQ0cll2J0+XInXCpvuemXNl/oIRBPDbB6R8Hhfm5q7mw5mVOympHX9fRSnTeIw9fJg==
       tarball: 'file:projects/api-extractor-test-01.tgz'
     version: 0.0.0
   'file:projects/api-extractor-test-02.tgz':
@@ -14318,7 +14318,7 @@ packages:
     dev: false
     name: '@rush-temp/api-extractor-test-02'
     resolution:
-      integrity: sha512-PZX/gxMwF5VNQixMkt4/dw5QOE9VlGgH1G4JbWcapHMG+hprMw4PZDT75ztE3+HPlVoyXOH8w3oV4lz4ibgCxQ==
+      integrity: sha512-zioYlIsu+02fcftni+oXlINztGuAgxLhxQiO3l3OJ5pmeZ6T3XZUmMsiLWY2fbIKsNxqm1R5UMfsdX7Z5Jo14A==
       tarball: 'file:projects/api-extractor-test-02.tgz'
     version: 0.0.0
   'file:projects/api-extractor-test-03.tgz':
@@ -14340,7 +14340,7 @@ packages:
     dev: false
     name: '@rush-temp/api-extractor-test-04'
     resolution:
-      integrity: sha512-xEYRuLo3KBPCTEvhyyALCtUfUTezX1HrxOdft9O3DACXsBawFHPVqZUbnN6IwISU9wuPl0p4jB0e9mzYvWpcxw==
+      integrity: sha512-JwMGU3lYK4vjLm/0SnnM632y3lJNxBALjTcjnNQGVaT1DbLUS7wNWit9PM+cG7Wf4RUxxsRnLYLgEYVv12/SnQ==
       tarball: 'file:projects/api-extractor-test-04.tgz'
     version: 0.0.0
   'file:projects/api-extractor.tgz':
@@ -14357,11 +14357,11 @@ packages:
       lodash: 4.17.15
       resolve: 1.17.0
       source-map: 0.6.1
-      typescript: 3.7.5
+      typescript: 3.9.5
     dev: false
     name: '@rush-temp/api-extractor'
     resolution:
-      integrity: sha512-dWZrORWaZuwFZRqm0DsNRMgwU/oWDr+L/G7Rq/uhpZkk3z8t1BhpfRhL2Z51IpCOapi15rm4fseal7gSGyOktA==
+      integrity: sha512-mVkgO7tYenwk5eQ1scHQeO6eL1vCjwQz3ht+4Btc+MJ1VVfSrtoSTHzpNtE3hOKXqkGxU2cdXC/kVPgiChd9sA==
       tarball: 'file:projects/api-extractor.tgz'
     version: 0.0.0
   'file:projects/debug-certificate-manager.tgz':
@@ -14376,7 +14376,7 @@ packages:
     dev: false
     name: '@rush-temp/debug-certificate-manager'
     resolution:
-      integrity: sha512-IvSBa1p0MZmX/znNDbEXovD0pXQDLvUpjDg13z0b9zNzOph2gGir0RY2qP3HoePFbhO0mCPkB2BfKmElFV+LlA==
+      integrity: sha512-RCmD4L/QRni3fAbW7QQIZWxgQ2BxCoaMBHhJNl+MN7Bt4mBZ7jZf1770fNzTba8TTXpq5RasjUU7ihGEL7qsOQ==
       tarball: 'file:projects/debug-certificate-manager.tgz'
     version: 0.0.0
   'file:projects/doc-plugin-rush-stack.tgz':
@@ -14389,7 +14389,7 @@ packages:
     dev: false
     name: '@rush-temp/doc-plugin-rush-stack'
     resolution:
-      integrity: sha512-67rl8eDnQoRJyBiS5rVmOILtlE9uwD4KhAzE9hegqlvvescIkZdnbDk/WpjvtwPpt5MV7AbFr3Qd0YXuB5XHPA==
+      integrity: sha512-N6qFz5WIhWV7dvh2FWM8knYWOx7AHQHg8LYJWTTXnfWHeJx74XlKiK+EzVYmOEMNXKCFj8ihIvNmUMBNZpUlzw==
       tarball: 'file:projects/doc-plugin-rush-stack.tgz'
     version: 0.0.0
   'file:projects/eslint-config.tgz':
@@ -14446,7 +14446,7 @@ packages:
     dev: false
     name: '@rush-temp/generate-api-docs'
     resolution:
-      integrity: sha512-EdMtO2cbdAOc2YMasycDyYvdhF3hVXEITM0q4W300CzRuoo18ygd4Fd6jFq+gv4r4WUuHABR/v1uhNZFDYMeig==
+      integrity: sha512-kYuy0KhmbVlRgzysnD3WPVUVnWCIELSGDkiyY9ggRdvrTAbBacjYEPbYp7qep6BXAzdqd7eDPuWv6e3mzwvVvg==
       tarball: 'file:projects/generate-api-docs.tgz'
     version: 0.0.0
   'file:projects/gulp-core-build-mocha.tgz':
@@ -14467,7 +14467,7 @@ packages:
     dev: false
     name: '@rush-temp/gulp-core-build-mocha'
     resolution:
-      integrity: sha512-r5zagOwKFMJIT08EmGOkouD3RBbzBjoMQaj+DH0BuhrwtnF8S0O0LVmvCbZtSnss1x/QsibTt0xILNBZJU9BUQ==
+      integrity: sha512-Xqz8CqQ8rJ5Xw1N2Ip4kOg0upYTuCVl0MbXWBfPWoEyTQtM7mDjoRwD+x20X+7Cq/CkXxkm2TxLBKDN8GSO/uA==
       tarball: 'file:projects/gulp-core-build-mocha.tgz'
     version: 0.0.0
   'file:projects/gulp-core-build-sass.tgz':
@@ -14490,7 +14490,7 @@ packages:
     dev: false
     name: '@rush-temp/gulp-core-build-sass'
     resolution:
-      integrity: sha512-LP8ALd6fp6blk8Fva7axAFB9M8T5YPjcnbYfjnNFfZPh3C8tQZKvSEFeKVR5oEv5t37zLZ5NUgIyEsdD90DJyw==
+      integrity: sha512-Mlna3VhrcK35LdQBockrHzexTwQj1LnjHrL+vlhi70m9UcCgrXSucynGMPNvGDHCv9O0mUC2O/XIFoUXdf8eeQ==
       tarball: 'file:projects/gulp-core-build-sass.tgz'
     version: 0.0.0
   'file:projects/gulp-core-build-serve.tgz':
@@ -14513,7 +14513,7 @@ packages:
     dev: false
     name: '@rush-temp/gulp-core-build-serve'
     resolution:
-      integrity: sha512-JX6RAbeJmH0AJ6VF2m1ieATu38qlK70vznNv2YkvDrMlmxhuz5PxdqAxTYLeComn9OitBe8H1b2i7RWSOlBGiA==
+      integrity: sha512-EcDZupb0dv3v+0Yve3aVwNEK0amNhR8o7nwaVOx+gOxhxXdUW1D2gv0ekKomJhO+m2xnWngGiCIY4qBGQlnwPA==
       tarball: 'file:projects/gulp-core-build-serve.tgz'
     version: 0.0.0
   'file:projects/gulp-core-build-typescript.tgz':
@@ -14532,7 +14532,7 @@ packages:
     dev: false
     name: '@rush-temp/gulp-core-build-typescript'
     resolution:
-      integrity: sha512-BTIoKXLaSalUvLyNEtpr6Nsz1SC/9cVJN2odHdiy29GDWVYQvhxWdO+4vDiAWm2AhjK1a23qZ+Oe4E7yAP/N3Q==
+      integrity: sha512-6wSeAy3PrwsXxBCmWnAtqK/xVuu40Nb42vQ/ym0fQ50mTTRDB6qhTgY+Yl3wseHBtf4UvVX8JaZExsaQdLhqqg==
       tarball: 'file:projects/gulp-core-build-typescript.tgz'
     version: 0.0.0
   'file:projects/gulp-core-build-webpack.tgz':
@@ -14550,7 +14550,7 @@ packages:
     dev: false
     name: '@rush-temp/gulp-core-build-webpack'
     resolution:
-      integrity: sha512-7DHcxPmoDQGDoYgf9PPuclHNPLb53GUC0aa+Dz64CxGizUkn0KU9Mqi8hf+U5ugMqZgcMzvVY0ol705k8x1fBA==
+      integrity: sha512-QC5XgdjN+DvNrs3GkM/txMlLSL+cWXdSrVyr4x4VKCaZtTUrdePomtnC0EptxRLIiDHdkP7L8kPxcJi5uGE69A==
       tarball: 'file:projects/gulp-core-build-webpack.tgz'
     version: 0.0.0
   'file:projects/gulp-core-build.tgz':
@@ -14603,7 +14603,7 @@ packages:
     dev: false
     name: '@rush-temp/gulp-core-build'
     resolution:
-      integrity: sha512-UQKOv9ZjOtOBH5Eb+zWyYVNs9vMnumse9cOaWVeFavzVPkkVDIO2yMJNq1zON6nkMKfZu8kLlHwuqBPXucB0ng==
+      integrity: sha512-h8DdNgMxQdLqlazyoNc0dKWCguq14N09od1C9pRC3QTL3nBEtmoAQY/cbFiAu5gu3s5DE3O1FD+s4c+4jJ7zBA==
       tarball: 'file:projects/gulp-core-build.tgz'
     version: 0.0.0
   'file:projects/heft.tgz':
@@ -14617,11 +14617,12 @@ packages:
       glob-escape: 0.0.2
       resolve: 1.17.0
       tapable: 1.1.3
+      true-case-path: 2.2.1
       typescript: 3.7.5
     dev: false
     name: '@rush-temp/heft'
     resolution:
-      integrity: sha512-1YmGkE2mFH4N6qovgib/WnBGop0omzNJ2jMPndigl3bVgLTS2miSt84JxGGpaTmLD0ZDBSmB5o0jReMYM6S+oA==
+      integrity: sha512-of6kz/4U9YQ+9xvHtrXWg1hQYlCEyrHJdUIptbeBpwJgBxS7DLn2ffzvWHm4Rts2Vs2NLiXm3OZS96tAoG5qSQ==
       tarball: 'file:projects/heft.tgz'
     version: 0.0.0
   'file:projects/load-themed-styles.tgz':
@@ -14635,7 +14636,7 @@ packages:
     dev: false
     name: '@rush-temp/load-themed-styles'
     resolution:
-      integrity: sha512-Yf0DHJF1N+ymVmX/r3NJDpZNKsCOPvtOvPdzASM4xo1tFepqGeuzD0BoK0KpsXz5REiZ2haSicwUYfyfGqA7hg==
+      integrity: sha512-01vIZKCCPY6M/uPP94vTdUGrFllQ7PFfmmdy/mY8oGDwETMqhahB08al3DizNfnf4mGCuWbvogPd3QvpLHQqlA==
       tarball: 'file:projects/load-themed-styles.tgz'
     version: 0.0.0
   'file:projects/loader-load-themed-styles.tgz':
@@ -14651,7 +14652,7 @@ packages:
     dev: false
     name: '@rush-temp/loader-load-themed-styles'
     resolution:
-      integrity: sha512-p4TOB+3wfySAQeAZknsW7mX2I8sZAKcxtq1MVOulih9t41GA991OGiOCZfGF2nQrGvCFFK9i8H26mR2hB8Y8pA==
+      integrity: sha512-p7Iw5IsjI2eu+A2NgaOiqndBPJ46DHdd/cpykA7DoS8nF8geTM6/74DuTnAWRzrVSbbEHT44+04zCeMZeu9Mrg==
       tarball: 'file:projects/loader-load-themed-styles.tgz'
     version: 0.0.0
   'file:projects/loader-raw-script.tgz':
@@ -14666,7 +14667,7 @@ packages:
     dev: false
     name: '@rush-temp/loader-raw-script'
     resolution:
-      integrity: sha512-yJrch7k+buHOl6UFsDY+DjgV92AJmEr5E4J2SlC5yPNcV8pBQHrBDdimavO82XRdkOVmIPtWRPgL6zLum/J24w==
+      integrity: sha512-g0YMLdY/Df2nQnUg3tP4osBSxrXDliwTFR8sD3qw5wrh7xtuF2JhsUXjMMeheAe31igxYUI2mYhPIsTUnDi1YQ==
       tarball: 'file:projects/loader-raw-script.tgz'
     version: 0.0.0
   'file:projects/localization-plugin-test-01.tgz':
@@ -14681,7 +14682,7 @@ packages:
     dev: false
     name: '@rush-temp/localization-plugin-test-01'
     resolution:
-      integrity: sha512-Gz89FBD3tp2YeGik3bbt/r96RSW3RxlN58sAsrIRZZov4RMfeq/McfWT6kC6JMDAbJlSYCmkuKeoN5ySOwcymQ==
+      integrity: sha512-T1h640rfmZr9IjXFfJU79OBnKR24s3d/T63izdP7l5QQSx0+ypQ3nZJX8cNK1LbuFPto31C7A0vcf/RjbM5j6w==
       tarball: 'file:projects/localization-plugin-test-01.tgz'
     version: 0.0.0
   'file:projects/localization-plugin-test-02.tgz':
@@ -14698,7 +14699,7 @@ packages:
     dev: false
     name: '@rush-temp/localization-plugin-test-02'
     resolution:
-      integrity: sha512-dGZN+v0pir0xAJfDWD8RrNzaLUf7Q+ap52M8kX/3WSc8o4A/IM+1VGhC2mDCOoTWGFqnV+l85hyFJYsV4WnkpA==
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       tarball: 'file:projects/localization-plugin-test-02.tgz'
     version: 0.0.0
   'file:projects/localization-plugin-test-03.tgz':
@@ -14713,7 +14714,7 @@ packages:
     dev: false
     name: '@rush-temp/localization-plugin-test-03'
     resolution:
-      integrity: sha512-fddgjDB89amP+XGWvRjSYn+pvw37w66YPNXEf5qm3veACqO6mAxtksJrm+/SG/XjCsCwIsSMdFonYr1SLqm+mg==
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       tarball: 'file:projects/localization-plugin-test-03.tgz'
     version: 0.0.0
   'file:projects/localization-plugin.tgz':
@@ -14734,7 +14735,7 @@ packages:
     dev: false
     name: '@rush-temp/localization-plugin'
     resolution:
-      integrity: sha512-Li3TTe8AaM1T9XSURG9Jy0LrSAQ5US5lywbNogPs2Ds8Zpt+KxBikEkv9gzXkjGYAWCtwmokbIMS5NbqvL0FdQ==
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       tarball: 'file:projects/localization-plugin.tgz'
     version: 0.0.0
   'file:projects/node-core-library.tgz':
@@ -14758,7 +14759,7 @@ packages:
     dev: false
     name: '@rush-temp/node-core-library'
     resolution:
-      integrity: sha512-IR4UV7p21U2xKefe3EhOzhBd0WyclbgfGs+2yMXORuzSaME+TrbJ1QBICRc7OnJCWk6zSqIhWhkQ/M0J7IyLkw==
+      integrity: sha512-N7DPoPcUe2jkYGGaJa3MgkilIglNa2QZwGr0JSjzCGEsV0HfHl4T3k4kAdYD5l77b+iL/qdVzGviiaHlwOQQ6g==
       tarball: 'file:projects/node-core-library.tgz'
     version: 0.0.0
   'file:projects/node-library-build-eslint-test.tgz':
@@ -14771,7 +14772,7 @@ packages:
     dev: false
     name: '@rush-temp/node-library-build-eslint-test'
     resolution:
-      integrity: sha512-H5dimoozdurJLKJAlmR/QgvE4Oac8+DqxRoOKIyLn/lUy6VViV5w+M/Rf2J8oYh898RUS0BIKa8zswnXsO+kKg==
+      integrity: sha512-hOP/rEc21giPwlkAXL9oMWM1kWDOwQfFbucvUvwFtnIvwRW5BU5hwfLUpLsjgiC5tQ1XBCLFojZqoGY8G9vRPQ==
       tarball: 'file:projects/node-library-build-eslint-test.tgz'
     version: 0.0.0
   'file:projects/node-library-build-tslint-test.tgz':
@@ -14784,7 +14785,7 @@ packages:
     dev: false
     name: '@rush-temp/node-library-build-tslint-test'
     resolution:
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     version: 0.0.0
   'file:projects/rush-stack-compiler-3.9-library-test.tgz':
@@ -15243,7 +15244,7 @@ packages:
     dev: false
     name: '@rush-temp/rush-stack-compiler-3.9-library-test'
     resolution:
-      integrity: sha512-iFdnUuhu0Yz46cU0VObpRWcN7jksPu+n9jK50jPhaeUXBmrnuR4FGYCjFGp/CA1SA3VYPQsXZaoDetxLmhx5Og==
+      integrity: sha512-e4zCSyw0fH/N1UmJiHkIcSvfzH8P01fIrf9MeEuSW+xG+BGXp73GHcNvJTsMcj9xNO/MIPOqZhW5YDLz5KNQug==
       tarball: 'file:projects/rush-stack-compiler-3.9-library-test.tgz'
     version: 0.0.0
   'file:projects/rush-stack-compiler-3.9.tgz':
@@ -15260,7 +15261,7 @@ packages:
     dev: false
     name: '@rush-temp/rush-stack-compiler-3.9'
     resolution:
-      integrity: sha512-/DQtIGWOa1k1XZRPap03pxX6+Kz9ZBgCMwFqsJLUuNu8J9xuAjX/d0/WH1A4t22TtnbkB6h7Lm88WduqQKHkEA==
+      integrity: sha512-xVJGjTvwoKsEaL4jZSCOazIX148/7CLF0IVh7kplkm2mGuHfoHRWMOXV5Y5I1DQRBw6d1CF/yOtRxgafd85EZw==
       tarball: 'file:projects/rush-stack-compiler-3.9.tgz'
     version: 0.0.0
   'file:projects/rush-stack-compiler-shared.tgz':
@@ -15286,7 +15287,7 @@ packages:
     dev: false
     name: '@rush-temp/rush'
     resolution:
-      integrity: sha512-SNu/yq7tulo0q4SQO2agROhH4FNws2wCbUQYleuCWcscK1TSW50hmeZY3pHlRYquKFEGLG7F3+osH6ggCD3UbA==
+      integrity: sha512-8p/3ugfWriL5cPcBzZDEUWDTKca1DMoNUWBaspRJRm2Qcp1AMjuX+sy+J03UnLUrSUnzSeTnLJs3nYzWd3mgPg==
       tarball: 'file:projects/rush.tgz'
     version: 0.0.0
   'file:projects/rushell.tgz':
@@ -15299,7 +15300,7 @@ packages:
     dev: false
     name: '@rush-temp/rushell'
     resolution:
-      integrity: sha512-5sXiTl7Usc1/FKUfE/P4VNEgLPFJlxYyLeWHZtjr5/lqe23umbq8gjUZLlVNHloNUbjmdgjrZQhEp5sqiENfdA==
+      integrity: sha512-sj5UrwwDh615gbhQbi8VgtSHhI89Ze+12DPBixnsa7sXZwYTQ+YVJ0dOBSYqITUyed/ZpPR70ADeW5hf90MCKg==
       tarball: 'file:projects/rushell.tgz'
     version: 0.0.0
   'file:projects/set-webpack-public-path-plugin.tgz':
@@ -15319,7 +15320,7 @@ packages:
     dev: false
     name: '@rush-temp/set-webpack-public-path-plugin'
     resolution:
-      integrity: sha512-hWFUISDs0hR53pbCC+h5M9i8ftfYzHEUrHvax/Ir7BLwijPJarr5kOeSdhM+KqcaSPoUzA/ek5Ttc0WVPLBmBQ==
+      integrity: sha512-yOQKXWQq3wS4mYOeM5yhKJetDcASn5jaOpPfpI6OByacPGdSvT0bUBWM8pxuPGGp0cchdq2+yAYYsDWJ1rbJ1g==
       tarball: 'file:projects/set-webpack-public-path-plugin.tgz'
     version: 0.0.0
   'file:projects/stream-collator.tgz':
@@ -15335,7 +15336,7 @@ packages:
     dev: false
     name: '@rush-temp/stream-collator'
     resolution:
-      integrity: sha512-t4VFdRKP6sb75hacRiamRhr7vTxiLn6m1bqr0yef8oL1gU5+m3X0qZN95XwX3LnExWMCbP7fR4BQ9pk2ZNQ24Q==
+      integrity: sha512-Nm5Bfyl1i2EnfGG7ijwlP2TBmti/JSJmgS14pl0FtRMDWOP599DOh36N5jw/z0krrYfieaF2zYOJBRqiHl+pzw==
       tarball: 'file:projects/stream-collator.tgz'
     version: 0.0.0
   'file:projects/ts-command-line-test.tgz':
@@ -15346,7 +15347,7 @@ packages:
     dev: false
     name: '@rush-temp/ts-command-line-test'
     resolution:
-      integrity: sha512-3Q9mruEsrLmdAzMoUJ4jjLPQ3WZk7AzblOoS+uDfGb+STekssyRyVb6oqY4Oofic0s6sseltAm0iCDQMygpttw==
+      integrity: sha512-BXoCr1E3CZHjcqlnDYLLP1F18ExjaJ8/m2qUTxBHEnayfy0Xmt9L3ZmslWzt6hFWSkuUEt5NlxkdGBXlFFNZfQ==
       tarball: 'file:projects/ts-command-line-test.tgz'
     version: 0.0.0
   'file:projects/ts-command-line.tgz':
@@ -15362,7 +15363,7 @@ packages:
     dev: false
     name: '@rush-temp/ts-command-line'
     resolution:
-      integrity: sha512-pQ48un6TgpznXL/QpbQ/93V6t04qgL39FRBdIyT92rH0+pIrjxWX3DENe7l6jpOOfEdDLvoR+eq7YYacsJPghQ==
+      integrity: sha512-Cj1urGxlYlcJQHPcUscx1jfRreiKbGCT04pqdo0QDEopcmL74h14ptjNgt6Q/UOO+a0s2Ou4OtVVv3het2xR8A==
       tarball: 'file:projects/ts-command-line.tgz'
     version: 0.0.0
   'file:projects/typings-generator.tgz':
@@ -15375,7 +15376,7 @@ packages:
     dev: false
     name: '@rush-temp/typings-generator'
     resolution:
-      integrity: sha512-jK9tg+WJwC5GM6G8KAMvLeQGaisFiG21Kj+t9vxUrK51vPvz4OxP9C8H8Hwe1gJ95Snq0UrYgtLsowa/jpzKUw==
+      integrity: sha512-NAT3Xv0oy0P4+NDUceFMc9vlJ4O1C/JZkH5cEBmNS0iQQ3hAo+SO1SFkJ4ihTNMPBVd0DS5b7XGm5xgRODLxjA==
       tarball: 'file:projects/typings-generator.tgz'
     version: 0.0.0
   'file:projects/web-library-build-test.tgz':
@@ -15387,7 +15388,7 @@ packages:
     dev: false
     name: '@rush-temp/web-library-build-test'
     resolution:
-      integrity: sha512-p0F5e4DX1O8WhT62D7YCoHLe5E9HTFS31CZYhR28tTosH5/oQ8D7dzBxC6oeCCP39u82OGqlmMCckt/hOr+AQw==
+      integrity: sha512-zK8JowWRhZ4Lbwzec4wvWmLqSWg4xY0xalIitKd1WHz3VoxW50BY/kJM/iWtcvjKtxCoYIdNbGNuDkOKkgzEIw==
       tarball: 'file:projects/web-library-build-test.tgz'
     version: 0.0.0
   'file:projects/web-library-build.tgz':
@@ -15399,7 +15400,7 @@ packages:
     dev: false
     name: '@rush-temp/web-library-build'
     resolution:
-      integrity: sha512-ZSVMR6xUJS8F5U+D7H6Ir0aBqXklwhAMYB5JHvwBkJUv9qo/T+BIPTfnFab09HHKKdSKlA/B8wtU/jNwYuYRlg==
+      integrity: sha512-2I0Hk+AmU4AtPc0R1PUNdsIewWhTvMuK0XDQBLYIg9XMWm5W41ValoiQV6mhxmPKNsg4MJvfhsktN6VltyUJgA==
       tarball: 'file:projects/web-library-build.tgz'
     version: 0.0.0
 registry: ''
@@ -15636,4 +15637,4 @@ specifiers:
   xmldoc: ~1.1.2
   yargs: ~4.6.0
   z-schema: ~3.18.3
-# shrinkwrap hash: c1b3ae14106bc9909931c76716eb2ae7b07b6735
+# shrinkwrap hash: 5dbb16ec43a73e51b9dc3633732be8e124ae6574

From af1f2c88e27c3c864a29b8ddb4ac85abab28f0ef Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 16:06:10 -0700
Subject: [PATCH 02/11] Log the TypeScript compiler version that will be used
 for analysis

---
 apps/api-extractor/src/api/ConsoleMessageId.ts | 5 +++++
 apps/api-extractor/src/api/Extractor.ts        | 6 ++++++
 apps/api-extractor/src/cli/RunAction.ts        | 2 +-
 common/reviews/api/api-extractor.api.md        | 1 +
 4 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/apps/api-extractor/src/api/ConsoleMessageId.ts b/apps/api-extractor/src/api/ConsoleMessageId.ts
index 82d04b07ce7..28419496d06 100644
--- a/apps/api-extractor/src/api/ConsoleMessageId.ts
+++ b/apps/api-extractor/src/api/ConsoleMessageId.ts
@@ -12,6 +12,11 @@
  * @public
  */
 export const enum ConsoleMessageId {
+  /**
+   * "Analysis will use the bundled TypeScript version ___"
+   */
+  Preamble = 'console-preamble',
+
   /**
    * "Found metadata in ___"
    */
diff --git a/apps/api-extractor/src/api/Extractor.ts b/apps/api-extractor/src/api/Extractor.ts
index 2ad06db17ae..8f68a7d225c 100644
--- a/apps/api-extractor/src/api/Extractor.ts
+++ b/apps/api-extractor/src/api/Extractor.ts
@@ -200,7 +200,13 @@ export class Extractor {
       showDiagnostics: !!options.showDiagnostics
     });
 
+    messageRouter.logInfo(
+      ConsoleMessageId.Preamble,
+      `Analysis will use the bundled TypeScript version ${ts.version}`
+    );
+
     if (messageRouter.showDiagnostics) {
+      messageRouter.logDiagnostic('');
       messageRouter.logDiagnosticHeader('Final prepared ExtractorConfig');
       messageRouter.logDiagnostic(extractorConfig.getDiagnosticDump());
       messageRouter.logDiagnosticFooter();
diff --git a/apps/api-extractor/src/cli/RunAction.ts b/apps/api-extractor/src/cli/RunAction.ts
index 85f971814ac..7b8cfed1398 100644
--- a/apps/api-extractor/src/cli/RunAction.ts
+++ b/apps/api-extractor/src/cli/RunAction.ts
@@ -138,7 +138,7 @@ export class RunAction extends CommandLineAction {
         }
       }
 
-      console.log(`Using configuration from ${configFilename}` + os.EOL);
+      console.log(`Using configuration from ${configFilename}`);
     }
 
     const configObjectFullPath: string = path.resolve(configFilename);
diff --git a/common/reviews/api/api-extractor.api.md b/common/reviews/api/api-extractor.api.md
index f74c763215c..f267f2c3cf8 100644
--- a/common/reviews/api/api-extractor.api.md
+++ b/common/reviews/api/api-extractor.api.md
@@ -24,6 +24,7 @@ export const enum ConsoleMessageId {
     ApiReportUnchanged = "console-api-report-unchanged",
     Diagnostics = "console-diagnostics",
     FoundTSDocMetadata = "console-found-tsdoc-metadata",
+    Preamble = "console-preamble",
     WritingDocModelFile = "console-writing-doc-model-file",
     WritingDtsRollup = "console-writing-dts-rollup"
 }

From 8ac0c45982e113ed42a722ca32a53d32ac05932d Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 16:54:13 -0700
Subject: [PATCH 03/11] Improve formatting of errors reported by
 CommandLineParser.execute()

---
 .../src/providers/CommandLineParser.ts               | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/libraries/ts-command-line/src/providers/CommandLineParser.ts b/libraries/ts-command-line/src/providers/CommandLineParser.ts
index 882c2ab010e..bc388efbef4 100644
--- a/libraries/ts-command-line/src/providers/CommandLineParser.ts
+++ b/libraries/ts-command-line/src/providers/CommandLineParser.ts
@@ -150,8 +150,16 @@ export abstract class CommandLineParser extends CommandLineParameterProvider {
             process.exitCode = err.exitCode;
           }
         } else {
-          const message: string = (err.message || 'An unknown error occurred').trim();
-          console.error(colors.red('Error: ' + message));
+          let message: string = (err.message || 'An unknown error occurred').trim();
+
+          // If the message doesn't already start with "Error:" then add a prefix
+          if (!/^(error|internal error|warning)\b/i.test(message)) {
+            message = 'Error: ' + message;
+          }
+
+          console.error();
+          console.error(colors.red(message));
+
           if (!process.exitCode) {
             process.exitCode = 1;
           }

From e726f84eb60017c7b38c7b67f4e9052aa0c4c2fe Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 16:57:35 -0700
Subject: [PATCH 04/11] Report a notice (but not a real warning) if the target
 project's TypesScript compiler appears to be incompatible

---
 apps/api-extractor/package.json               |  2 +
 .../api-extractor/src/api/ConsoleMessageId.ts |  6 +++
 apps/api-extractor/src/api/Extractor.ts       | 54 +++++++++++++++++--
 common/reviews/api/api-extractor.api.md       |  1 +
 4 files changed, 58 insertions(+), 5 deletions(-)

diff --git a/apps/api-extractor/package.json b/apps/api-extractor/package.json
index 6f5d926cb54..331c9e5ffe7 100644
--- a/apps/api-extractor/package.json
+++ b/apps/api-extractor/package.json
@@ -39,6 +39,7 @@
     "colors": "~1.2.1",
     "lodash": "~4.17.15",
     "resolve": "~1.17.0",
+    "semver": "~5.3.0",
     "source-map": "~0.6.1",
     "typescript": "~3.9.5"
   },
@@ -48,6 +49,7 @@
     "@rushstack/eslint-config": "1.0.2",
     "@types/jest": "25.2.1",
     "@types/lodash": "4.14.116",
+    "@types/semver": "5.3.33",
     "@types/node": "10.17.13",
     "@types/resolve": "1.17.1",
     "gulp": "~4.0.2"
diff --git a/apps/api-extractor/src/api/ConsoleMessageId.ts b/apps/api-extractor/src/api/ConsoleMessageId.ts
index 28419496d06..ffc0eb166ac 100644
--- a/apps/api-extractor/src/api/ConsoleMessageId.ts
+++ b/apps/api-extractor/src/api/ConsoleMessageId.ts
@@ -17,6 +17,12 @@ export const enum ConsoleMessageId {
    */
   Preamble = 'console-preamble',
 
+  /**
+   * "The target project appears to use TypeScript ___ which is newer than the bundled compiler engine;
+   * consider upgrading API Extractor."
+   */
+  CompilerVersionNotice = 'console-compiler-version-notice',
+
   /**
    * "Found metadata in ___"
    */
diff --git a/apps/api-extractor/src/api/Extractor.ts b/apps/api-extractor/src/api/Extractor.ts
index 8f68a7d225c..6d7e4a96da2 100644
--- a/apps/api-extractor/src/api/Extractor.ts
+++ b/apps/api-extractor/src/api/Extractor.ts
@@ -2,8 +2,16 @@
 // See LICENSE in the project root for license information.
 
 import * as path from 'path';
+import * as semver from 'semver';
 import * as ts from 'typescript';
-import { FileSystem, NewlineKind, PackageJsonLookup, IPackageJson } from '@rushstack/node-core-library';
+import * as resolve from 'resolve';
+import {
+  FileSystem,
+  NewlineKind,
+  PackageJsonLookup,
+  IPackageJson,
+  INodePackageJson
+} from '@rushstack/node-core-library';
 
 import { ExtractorConfig } from './ExtractorConfig';
 import { Collector } from '../collector/Collector';
@@ -200,10 +208,7 @@ export class Extractor {
       showDiagnostics: !!options.showDiagnostics
     });
 
-    messageRouter.logInfo(
-      ConsoleMessageId.Preamble,
-      `Analysis will use the bundled TypeScript version ${ts.version}`
-    );
+    this._checkCompilerCompatibility(extractorConfig, messageRouter);
 
     if (messageRouter.showDiagnostics) {
       messageRouter.logDiagnostic('');
@@ -401,6 +406,45 @@ export class Extractor {
     });
   }
 
+  private static _checkCompilerCompatibility(
+    extractorConfig: ExtractorConfig,
+    messageRouter: MessageRouter
+  ): void {
+    messageRouter.logInfo(
+      ConsoleMessageId.Preamble,
+      `Analysis will use the bundled TypeScript version ${ts.version}`
+    );
+
+    try {
+      const typescriptPath: string = resolve.sync('typescript', {
+        basedir: extractorConfig.projectFolder,
+        preserveSymlinks: false
+      });
+      const packageJsonLookup: PackageJsonLookup = new PackageJsonLookup();
+      const packageJson: INodePackageJson | undefined = packageJsonLookup.tryLoadNodePackageJsonFor(
+        typescriptPath
+      );
+      if (packageJson && packageJson.version && semver.valid(packageJson.version)) {
+        // Consider a newer MINOR release to be incompatible
+        const ourMajor: number = semver.major(ts.version);
+        const ourMinor: number = semver.minor(ts.version);
+
+        const theirMajor: number = semver.major(packageJson.version);
+        const theirMinor: number = semver.minor(packageJson.version);
+
+        if (theirMajor > ourMajor || (theirMajor === ourMajor && theirMinor > ourMinor)) {
+          messageRouter.logInfo(
+            ConsoleMessageId.CompilerVersionNotice,
+            `*** The target project appears to use TypeScript ${packageJson.version} which is newer than the` +
+              ` bundled compiler engine; consider upgrading API Extractor.`
+          );
+        }
+      }
+    } catch (e) {
+      // The compiler detection heuristic is not expected to work in many configurations
+    }
+  }
+
   private static _generateRollupDtsFile(
     collector: Collector,
     outputPath: string,
diff --git a/common/reviews/api/api-extractor.api.md b/common/reviews/api/api-extractor.api.md
index f267f2c3cf8..d1689f7e60d 100644
--- a/common/reviews/api/api-extractor.api.md
+++ b/common/reviews/api/api-extractor.api.md
@@ -22,6 +22,7 @@ export const enum ConsoleMessageId {
     ApiReportFolderMissing = "console-api-report-folder-missing",
     ApiReportNotCopied = "console-api-report-not-copied",
     ApiReportUnchanged = "console-api-report-unchanged",
+    CompilerVersionNotice = "console-compiler-version-notice",
     Diagnostics = "console-diagnostics",
     FoundTSDocMetadata = "console-found-tsdoc-metadata",
     Preamble = "console-preamble",

From 58cb5c7b94a257586e288b7a909dfe92772f8201 Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 17:15:41 -0700
Subject: [PATCH 05/11] Add file/line information to ExportAnalyzer.ts error
 messages

---
 .../src/analyzer/ExportAnalyzer.ts            | 33 ++++++++++++++-----
 1 file changed, 24 insertions(+), 9 deletions(-)

diff --git a/apps/api-extractor/src/analyzer/ExportAnalyzer.ts b/apps/api-extractor/src/analyzer/ExportAnalyzer.ts
index 275c62025ca..f87c1840c6f 100644
--- a/apps/api-extractor/src/analyzer/ExportAnalyzer.ts
+++ b/apps/api-extractor/src/analyzer/ExportAnalyzer.ts
@@ -427,7 +427,10 @@ export class ExportAnalyzer {
         const exportSpecifier: ts.ExportSpecifier = declaration as ts.ExportSpecifier;
         exportName = (exportSpecifier.propertyName || exportSpecifier.name).getText().trim();
       } else {
-        throw new InternalError('Unimplemented export declaration kind: ' + declaration.getText());
+        throw new InternalError(
+          `Unimplemented export declaration kind: ${declaration.getText()}\n` +
+            SourceFileLocationFormatter.formatDeclaration(declaration)
+        );
       }
 
       // Ignore "export { A }" without a module specifier
@@ -485,9 +488,8 @@ export class ExportAnalyzer {
           // The implementation here only works when importing from an external module.
           // The full solution is tracked by: https://github.com/microsoft/rushstack/issues/1029
           throw new Error(
-            '"import * as ___ from ___;" is not supported yet for local files.' +
-              '\nFailure in: ' +
-              importDeclaration.getSourceFile().fileName
+            '"import * as ___ from ___;" is not supported yet for local files.\n' +
+              SourceFileLocationFormatter.formatDeclaration(importDeclaration)
           );
         }
 
@@ -571,7 +573,10 @@ export class ExportAnalyzer {
           declarationSymbol
         );
       } else {
-        throw new InternalError('Unimplemented import declaration kind: ' + declaration.getText());
+        throw new InternalError(
+          `Unimplemented import declaration kind: ${declaration.getText()}\n` +
+            SourceFileLocationFormatter.formatDeclaration(declaration)
+        );
       }
     }
 
@@ -715,7 +720,10 @@ export class ExportAnalyzer {
       importOrExportDeclaration
     );
     if (!moduleSpecifier) {
-      throw new InternalError('Unable to parse module specifier');
+      throw new InternalError(
+        'Unable to parse module specifier\n' +
+          SourceFileLocationFormatter.formatDeclaration(importOrExportDeclaration)
+      );
     }
 
     // Match:       "@microsoft/sp-lodash-subset" or "lodash/has"
@@ -740,7 +748,10 @@ export class ExportAnalyzer {
       importOrExportDeclaration
     );
     if (!moduleSpecifier) {
-      throw new InternalError('Unable to parse module specifier');
+      throw new InternalError(
+        'Unable to parse module specifier\n' +
+          SourceFileLocationFormatter.formatDeclaration(importOrExportDeclaration)
+      );
     }
 
     const resolvedModule: ts.ResolvedModuleFull | undefined = TypeScriptInternals.getResolvedModule(
@@ -751,8 +762,11 @@ export class ExportAnalyzer {
     if (resolvedModule === undefined) {
       // This should not happen, since getResolvedModule() specifically looks up names that the compiler
       // found in export declarations for this source file
+      //
+      // Encountered in https://github.com/microsoft/rushstack/issues/1914
       throw new InternalError(
-        'getResolvedModule() could not resolve module name ' + JSON.stringify(moduleSpecifier)
+        `getResolvedModule() could not resolve module name ${JSON.stringify(moduleSpecifier)}\n` +
+          SourceFileLocationFormatter.formatDeclaration(importOrExportDeclaration)
       );
     }
 
@@ -765,7 +779,8 @@ export class ExportAnalyzer {
       // This should not happen, since getResolvedModule() specifically looks up names that the compiler
       // found in export declarations for this source file
       throw new InternalError(
-        'getSourceFile() failed to locate ' + JSON.stringify(resolvedModule.resolvedFileName)
+        `getSourceFile() failed to locate ${JSON.stringify(resolvedModule.resolvedFileName)}\n` +
+          SourceFileLocationFormatter.formatDeclaration(importOrExportDeclaration)
       );
     }
 

From 6417654c138577f930431b01986b24b38917eb5c Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 18:05:09 -0700
Subject: [PATCH 06/11] Upgrade build-tests projects that use the "latest"
 TypeScript compiler

---
 build-tests/api-documenter-test/package.json  |  2 +-
 .../api-extractor-lib2-test/package.json      |  2 +-
 .../api-extractor-lib3-test/package.json      |  2 +-
 .../api-extractor-scenarios/package.json      |  2 +-
 .../api-extractor-test-01/package.json        |  2 +-
 .../api-extractor-test-02/package.json        |  2 +-
 .../api-extractor-test-03/package.json        |  2 +-
 .../api-extractor-test-04/package.json        |  2 +-
 build-tests/ts-command-line-test/package.json |  2 +-
 common/config/rush/pnpm-lock.yaml             | 42 ++++++++++---------
 10 files changed, 31 insertions(+), 29 deletions(-)

diff --git a/build-tests/api-documenter-test/package.json b/build-tests/api-documenter-test/package.json
index b108cbf5a3e..03501a33657 100644
--- a/build-tests/api-documenter-test/package.json
+++ b/build-tests/api-documenter-test/package.json
@@ -14,6 +14,6 @@
     "@types/jest": "25.2.1",
     "@types/node": "10.17.13",
     "fs-extra": "~7.0.1",
-    "typescript": "~3.7.2"
+    "typescript": "~3.9.5"
   }
 }
diff --git a/build-tests/api-extractor-lib2-test/package.json b/build-tests/api-extractor-lib2-test/package.json
index 4fb95f686fc..c571da5e2b8 100644
--- a/build-tests/api-extractor-lib2-test/package.json
+++ b/build-tests/api-extractor-lib2-test/package.json
@@ -13,6 +13,6 @@
     "@types/jest": "25.2.1",
     "@types/node": "10.17.13",
     "fs-extra": "~7.0.1",
-    "typescript": "~3.7.2"
+    "typescript": "~3.9.5"
   }
 }
diff --git a/build-tests/api-extractor-lib3-test/package.json b/build-tests/api-extractor-lib3-test/package.json
index c7699d05ea8..09f1d16af80 100644
--- a/build-tests/api-extractor-lib3-test/package.json
+++ b/build-tests/api-extractor-lib3-test/package.json
@@ -16,6 +16,6 @@
     "@types/jest": "25.2.1",
     "@types/node": "10.17.13",
     "fs-extra": "~7.0.1",
-    "typescript": "~3.7.2"
+    "typescript": "~3.9.5"
   }
 }
diff --git a/build-tests/api-extractor-scenarios/package.json b/build-tests/api-extractor-scenarios/package.json
index 9d6c2465802..df205f031e4 100644
--- a/build-tests/api-extractor-scenarios/package.json
+++ b/build-tests/api-extractor-scenarios/package.json
@@ -19,6 +19,6 @@
     "api-extractor-lib3-test": "1.0.0",
     "colors": "~1.2.1",
     "fs-extra": "~7.0.1",
-    "typescript": "~3.7.2"
+    "typescript": "~3.9.5"
   }
 }
diff --git a/build-tests/api-extractor-test-01/package.json b/build-tests/api-extractor-test-01/package.json
index 2016ad24046..8ed3e8dd9a5 100644
--- a/build-tests/api-extractor-test-01/package.json
+++ b/build-tests/api-extractor-test-01/package.json
@@ -17,6 +17,6 @@
     "@microsoft/api-extractor": "7.8.15",
     "@types/node": "10.17.13",
     "fs-extra": "~7.0.1",
-    "typescript": "~3.7.2"
+    "typescript": "~3.9.5"
   }
 }
diff --git a/build-tests/api-extractor-test-02/package.json b/build-tests/api-extractor-test-02/package.json
index a95519e9f66..8879ea0e95e 100644
--- a/build-tests/api-extractor-test-02/package.json
+++ b/build-tests/api-extractor-test-02/package.json
@@ -17,6 +17,6 @@
     "@microsoft/api-extractor": "7.8.15",
     "@types/node": "10.17.13",
     "fs-extra": "~7.0.1",
-    "typescript": "~3.7.2"
+    "typescript": "~3.9.5"
   }
 }
diff --git a/build-tests/api-extractor-test-03/package.json b/build-tests/api-extractor-test-03/package.json
index 72559d2be9d..b4f5d59e5aa 100644
--- a/build-tests/api-extractor-test-03/package.json
+++ b/build-tests/api-extractor-test-03/package.json
@@ -11,6 +11,6 @@
     "@types/node": "10.17.13",
     "api-extractor-test-02": "1.0.0",
     "fs-extra": "~7.0.1",
-    "typescript": "~3.7.2"
+    "typescript": "~3.9.5"
   }
 }
diff --git a/build-tests/api-extractor-test-04/package.json b/build-tests/api-extractor-test-04/package.json
index cf15d84291e..ca4e3d1bae9 100644
--- a/build-tests/api-extractor-test-04/package.json
+++ b/build-tests/api-extractor-test-04/package.json
@@ -12,6 +12,6 @@
     "@microsoft/api-extractor": "7.8.15",
     "api-extractor-lib1-test": "1.0.0",
     "fs-extra": "~7.0.1",
-    "typescript": "~3.7.2"
+    "typescript": "~3.9.5"
   }
 }
diff --git a/build-tests/ts-command-line-test/package.json b/build-tests/ts-command-line-test/package.json
index 44104bcb097..ac8dee93797 100644
--- a/build-tests/ts-command-line-test/package.json
+++ b/build-tests/ts-command-line-test/package.json
@@ -11,6 +11,6 @@
     "@rushstack/ts-command-line": "4.4.5",
     "@types/node": "10.17.13",
     "fs-extra": "~7.0.1",
-    "typescript": "~3.7.2"
+    "typescript": "~3.9.5"
   }
 }
diff --git a/common/config/rush/pnpm-lock.yaml b/common/config/rush/pnpm-lock.yaml
index 90015a8fd7a..fec83d2528b 100644
--- a/common/config/rush/pnpm-lock.yaml
+++ b/common/config/rush/pnpm-lock.yaml
@@ -14206,11 +14206,11 @@ packages:
       '@types/jest': 25.2.1
       '@types/node': 10.17.13
       fs-extra: 7.0.1
-      typescript: 3.7.5
+      typescript: 3.9.5
     dev: false
     name: '@rush-temp/api-documenter-test'
     resolution:
-      integrity: sha512-oSQHe/WAGn2pGDzHNxy/ebbHwgV5EkUiaHoDC5mFveZi/YbZt8DfhcFzCAIzP/7M19h4bhhD9dkmDencC/4Q/A==
+      integrity: sha512-Qk1biNNk3nWYenDTiIqYW70vLuReSnw31Rc2Fd85le2izmqMzpVYoisw+KF8ja6Xt9ypQd1h0eUvDy31hTEyDQ==
       tarball: 'file:projects/api-documenter-test.tgz'
     version: 0.0.0
   'file:projects/api-documenter.tgz':
@@ -14247,11 +14247,11 @@ packages:
       '@types/jest': 25.2.1
       '@types/node': 10.17.13
       fs-extra: 7.0.1
-      typescript: 3.7.5
+      typescript: 3.9.5
     dev: false
     name: '@rush-temp/api-extractor-lib2-test'
     resolution:
-      integrity: sha512-d/guVZZpVbV7X0N8WYQfltz0frTUO/Al4vq73fb9AF22TcWTmA+lFxlc7bMuXi/UZNtmpkH/kJ27YCSbeCuMkg==
+      integrity: sha512-0u0G7fscl+qgsZ7GNjTcRgAKGFVUvrk8UhgIe0bHUQhwruHEjrTvpjdM0HbsdOhfVt63fn+AkP4q0JCK15ZxKQ==
       tarball: 'file:projects/api-extractor-lib2-test.tgz'
     version: 0.0.0
   'file:projects/api-extractor-lib3-test.tgz':
@@ -14259,11 +14259,11 @@ packages:
       '@types/jest': 25.2.1
       '@types/node': 10.17.13
       fs-extra: 7.0.1
-      typescript: 3.7.5
+      typescript: 3.9.5
     dev: false
     name: '@rush-temp/api-extractor-lib3-test'
     resolution:
-      integrity: sha512-B3J22QVJJC5kWnBLgDh6XjcwyEwwFRKvdA43oi1wPCvlqLW6RTrH8YA2SJVAMNf3rVSYWJHnFpwekfeGuqJ0Kg==
+      integrity: sha512-W+ZrYIx1rYjFin/GB0CmDltXHLL3OsJ9xxoPcH5wuZQWODiP6bBD6rpeREeoZ3webIwF7yz5RWKZ27PDgUCJDg==
       tarball: 'file:projects/api-extractor-lib3-test.tgz'
     version: 0.0.0
   'file:projects/api-extractor-model.tgz':
@@ -14287,11 +14287,11 @@ packages:
       '@types/node': 10.17.13
       colors: 1.2.5
       fs-extra: 7.0.1
-      typescript: 3.7.5
+      typescript: 3.9.5
     dev: false
     name: '@rush-temp/api-extractor-scenarios'
     resolution:
-      integrity: sha512-dioxOVTQZgT+tuCvtcottdkiVTOvej/eLPIiz+W+vp71jbjzComxaKwxXokzw3XmvqIiW/HJajG55q+B0O+WDw==
+      integrity: sha512-eUE0t2GtLcGwT3WjFlgrRtxwNKaizkYauWQew1fRglDIMQp+KBwslGEVkqq60fy9vUQF5ccnP+Vp9l42kxrXAw==
       tarball: 'file:projects/api-extractor-scenarios.tgz'
     version: 0.0.0
   'file:projects/api-extractor-test-01.tgz':
@@ -14301,11 +14301,11 @@ packages:
       '@types/node': 10.17.13
       fs-extra: 7.0.1
       long: 4.0.0
-      typescript: 3.7.5
+      typescript: 3.9.5
     dev: false
     name: '@rush-temp/api-extractor-test-01'
     resolution:
-      integrity: sha512-gRBxDF1RjKcabsNcInRgWQ0cll2J0+XInXCpvuemXNl/oIRBPDbB6R8Hhfm5q7mw5mVOympHX9fRSnTeIw9fJg==
+      integrity: sha512-gtQg1x+6BbSPaQJzE2lXPhYuASORkogG94ctPkiyst6rEYlHifzW0rPB8TyEo+SjzcsVNil6Q8UygxxtBkR/dg==
       tarball: 'file:projects/api-extractor-test-01.tgz'
     version: 0.0.0
   'file:projects/api-extractor-test-02.tgz':
@@ -14314,11 +14314,11 @@ packages:
       '@types/semver': 5.3.33
       fs-extra: 7.0.1
       semver: 5.3.0
-      typescript: 3.7.5
+      typescript: 3.9.5
     dev: false
     name: '@rush-temp/api-extractor-test-02'
     resolution:
-      integrity: sha512-zioYlIsu+02fcftni+oXlINztGuAgxLhxQiO3l3OJ5pmeZ6T3XZUmMsiLWY2fbIKsNxqm1R5UMfsdX7Z5Jo14A==
+      integrity: sha512-Omu2+uEnL+lWKpDSyzZITCAMVmH8rx6Y18u84GNt5CYiVHatjpOTco0mt0vgXE6BZn4/W9SCNtSirUZt6hDzWA==
       tarball: 'file:projects/api-extractor-test-02.tgz'
     version: 0.0.0
   'file:projects/api-extractor-test-03.tgz':
@@ -14326,21 +14326,21 @@ packages:
       '@types/jest': 25.2.1
       '@types/node': 10.17.13
       fs-extra: 7.0.1
-      typescript: 3.7.5
+      typescript: 3.9.5
     dev: false
     name: '@rush-temp/api-extractor-test-03'
     resolution:
-      integrity: sha512-ZvlDjrJG25V7ogORzsOPh4nVRVeG/nrL76fjzlBBgloKTx8/IDbpesiwir9eFgL6mZKjW7Tsl69ueatf2x5NQQ==
+      integrity: sha512-18X0hgAkdqA62AK05QDSJhrdxEa29yRZ+lZ98jFzISa4ae0oovpvHfdkELnZCpzaSpDrsGO/iC8D2SRlPhWQ1w==
       tarball: 'file:projects/api-extractor-test-03.tgz'
     version: 0.0.0
   'file:projects/api-extractor-test-04.tgz':
     dependencies:
       fs-extra: 7.0.1
-      typescript: 3.7.5
+      typescript: 3.9.5
     dev: false
     name: '@rush-temp/api-extractor-test-04'
     resolution:
-      integrity: sha512-JwMGU3lYK4vjLm/0SnnM632y3lJNxBALjTcjnNQGVaT1DbLUS7wNWit9PM+cG7Wf4RUxxsRnLYLgEYVv12/SnQ==
+      integrity: sha512-kuJ7xZ9rFAB1Xha/iTothhJRqXIUF2s3t+c6hj6Ls8jufjpo+jwnk2ho4TrjzCI7hzGP7ydLnXywFKZhZ0GuIQ==
       tarball: 'file:projects/api-extractor-test-04.tgz'
     version: 0.0.0
   'file:projects/api-extractor.tgz':
@@ -14352,16 +14352,18 @@ packages:
       '@types/lodash': 4.14.116
       '@types/node': 10.17.13
       '@types/resolve': 1.17.1
+      '@types/semver': 5.3.33
       colors: 1.2.5
       gulp: 4.0.2
       lodash: 4.17.15
       resolve: 1.17.0
+      semver: 5.3.0
       source-map: 0.6.1
       typescript: 3.9.5
     dev: false
     name: '@rush-temp/api-extractor'
     resolution:
-      integrity: sha512-mVkgO7tYenwk5eQ1scHQeO6eL1vCjwQz3ht+4Btc+MJ1VVfSrtoSTHzpNtE3hOKXqkGxU2cdXC/kVPgiChd9sA==
+      integrity: sha512-SPDsuk+UHLaWEUHD7HIjB4jisVMV/JgIstW5vjnQADDENYwSEicA0vnH6j4CIfZHDMq8Gf2y73XMLLmtdS5DeQ==
       tarball: 'file:projects/api-extractor.tgz'
     version: 0.0.0
   'file:projects/debug-certificate-manager.tgz':
@@ -15343,11 +15345,11 @@ packages:
     dependencies:
       '@types/node': 10.17.13
       fs-extra: 7.0.1
-      typescript: 3.7.5
+      typescript: 3.9.5
     dev: false
     name: '@rush-temp/ts-command-line-test'
     resolution:
-      integrity: sha512-BXoCr1E3CZHjcqlnDYLLP1F18ExjaJ8/m2qUTxBHEnayfy0Xmt9L3ZmslWzt6hFWSkuUEt5NlxkdGBXlFFNZfQ==
+      integrity: sha512-AQxi+9T6peEEsJWdyCZVEzd6r4jQaQ5EVbQEoWAZ9NOIIVEpjUZLaiEO/d93ggEGQqKvHB479OgtbgJbUyXhFg==
       tarball: 'file:projects/ts-command-line-test.tgz'
     version: 0.0.0
   'file:projects/ts-command-line.tgz':
@@ -15637,4 +15639,4 @@ specifiers:
   xmldoc: ~1.1.2
   yargs: ~4.6.0
   z-schema: ~3.18.3
-# shrinkwrap hash: 5dbb16ec43a73e51b9dc3633732be8e124ae6574
+# shrinkwrap hash: bab8e24cea983bf1cf2b941875a9fe13cf462d64

From 1dd3f8e920d7c8ca06b553b7ccbc73a109ac1c10 Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 18:05:35 -0700
Subject: [PATCH 07/11] Filter the new ConsoleMessageId.Preamble message from
 the api-extractor-scenarios output

---
 .../api-extractor-scenarios/src/runScenarios.ts      | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/build-tests/api-extractor-scenarios/src/runScenarios.ts b/build-tests/api-extractor-scenarios/src/runScenarios.ts
index 23328c6b6c7..a2385ef22fd 100644
--- a/build-tests/api-extractor-scenarios/src/runScenarios.ts
+++ b/build-tests/api-extractor-scenarios/src/runScenarios.ts
@@ -93,9 +93,15 @@ export function runScenarios(buildConfigPath: string): void {
       localBuild: true,
       showVerboseMessages: true,
       messageCallback: (message: ExtractorMessage) => {
-        if (message.messageId === ConsoleMessageId.ApiReportCreated) {
-          // This script deletes the outputs for a clean build, so don't issue a warning if the file gets created
-          message.logLevel = ExtractorLogLevel.None;
+        switch (message.messageId) {
+          case ConsoleMessageId.ApiReportCreated:
+            // This script deletes the outputs for a clean build, so don't issue a warning if the file gets created
+            message.logLevel = ExtractorLogLevel.None;
+            break;
+          case ConsoleMessageId.Preamble:
+            // Less verbose output
+            message.logLevel = ExtractorLogLevel.None;
+            break;
         }
       },
       compilerState

From 6a526b329e1e8e24f701dc9f6112d26b11514fc5 Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 18:09:51 -0700
Subject: [PATCH 08/11] rush change

---
 .../octogonz-upgrade-ae_2020-07-03-01-09.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-01-09.json         | 11 +++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 common/changes/@microsoft/api-extractor/octogonz-upgrade-ae_2020-07-03-01-09.json
 create mode 100644 common/changes/@rushstack/ts-command-line/octogonz-upgrade-ae_2020-07-03-01-09.json

diff --git a/common/changes/@microsoft/api-extractor/octogonz-upgrade-ae_2020-07-03-01-09.json b/common/changes/@microsoft/api-extractor/octogonz-upgrade-ae_2020-07-03-01-09.json
new file mode 100644
index 00000000000..7014e461e50
--- /dev/null
+++ b/common/changes/@microsoft/api-extractor/octogonz-upgrade-ae_2020-07-03-01-09.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@microsoft/api-extractor",
+      "comment": "Upgrade the bundled compiler engine to TypeScript 3.9",
+      "type": "minor"
+    }
+  ],
+  "packageName": "@microsoft/api-extractor",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@rushstack/ts-command-line/octogonz-upgrade-ae_2020-07-03-01-09.json b/common/changes/@rushstack/ts-command-line/octogonz-upgrade-ae_2020-07-03-01-09.json
new file mode 100644
index 00000000000..220ee40325f
--- /dev/null
+++ b/common/changes/@rushstack/ts-command-line/octogonz-upgrade-ae_2020-07-03-01-09.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@rushstack/ts-command-line",
+      "comment": "Improve formatting of errors reported by CommandLineParser.execute()",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@rushstack/ts-command-line",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file

From 7c73e2068dfa6a411ada99a8f4952465fd0d4bae Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 18:11:59 -0700
Subject: [PATCH 09/11] rush change

---
 .../octogonz-upgrade-ae_2020-07-03-01-11.json         | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 common/changes/@microsoft/api-extractor/octogonz-upgrade-ae_2020-07-03-01-11.json

diff --git a/common/changes/@microsoft/api-extractor/octogonz-upgrade-ae_2020-07-03-01-11.json b/common/changes/@microsoft/api-extractor/octogonz-upgrade-ae_2020-07-03-01-11.json
new file mode 100644
index 00000000000..c3c6041e953
--- /dev/null
+++ b/common/changes/@microsoft/api-extractor/octogonz-upgrade-ae_2020-07-03-01-11.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@microsoft/api-extractor",
+      "comment": "Log the TypeScript bundled compiler version, and warn if it is outdated",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@microsoft/api-extractor",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file

From 8df32e6ad2f508e4ebebdb09ad4b6391d43496e3 Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 20:19:14 -0700
Subject: [PATCH 10/11] Disable typescriptCompilerFolder since the latest API
 Extractor seems to work better without it

---
 .../src/shared/ApiExtractorRunner.ts                      | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/stack/rush-stack-compiler-shared/src/shared/ApiExtractorRunner.ts b/stack/rush-stack-compiler-shared/src/shared/ApiExtractorRunner.ts
index c5c31d551a9..6d9f5d518e0 100644
--- a/stack/rush-stack-compiler-shared/src/shared/ApiExtractorRunner.ts
+++ b/stack/rush-stack-compiler-shared/src/shared/ApiExtractorRunner.ts
@@ -5,7 +5,6 @@ import { ITerminalProvider } from '@rushstack/node-core-library';
 
 import { RushStackCompilerBase, IRushStackCompilerBaseOptions } from './RushStackCompilerBase';
 import { ApiExtractor } from './index';
-import { ToolPaths } from './ToolPaths';
 import { LoggingUtilities } from './LoggingUtilities';
 
 /**
@@ -116,8 +115,11 @@ export class ApiExtractorRunner extends RushStackCompilerBase {
             }
           }
           message.handled = true;
-        },
-        typescriptCompilerFolder: ToolPaths.typescriptPackagePath
+        }
+        // In the past we configured API Extractor to use the TypeScript runtime declarations from
+        // the local compiler, however lately it seems to work better without this option.
+        //
+        // typescriptCompilerFolder: ToolPaths.typescriptPackagePath
       };
 
       // NOTE: ExtractorResult.succeeded indicates whether errors or warnings occurred, however we

From 8444c1ee6c494c2b0a40d2ed4b5761363219d251 Mon Sep 17 00:00:00 2001
From: Pete Gonzalez <4673363+octogonz@users.noreply.github.com>
Date: Thu, 2 Jul 2020 20:25:06 -0700
Subject: [PATCH 11/11] rush change

---
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 .../octogonz-upgrade-ae_2020-07-03-03-23.json         | 11 +++++++++++
 14 files changed, 154 insertions(+)
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-2.4/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-2.7/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-2.8/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-2.9/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-3.0/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-3.1/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-3.2/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-3.3/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-3.4/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-3.5/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-3.6/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-3.7/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-3.8/octogonz-upgrade-ae_2020-07-03-03-23.json
 create mode 100644 common/changes/@microsoft/rush-stack-compiler-3.9/octogonz-upgrade-ae_2020-07-03-03-23.json

diff --git a/common/changes/@microsoft/rush-stack-compiler-2.4/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-2.4/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..f0229c1624e
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-2.4/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-2.4"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-2.4",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-2.7/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-2.7/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..563da5177fc
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-2.7/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-2.7"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-2.7",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-2.8/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-2.8/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..dbfa3f116b4
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-2.8/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-2.8"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-2.8",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-2.9/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-2.9/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..c758e494e07
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-2.9/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-2.9"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-2.9",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-3.0/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-3.0/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..03412718ed8
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-3.0/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-3.0"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-3.0",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-3.1/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-3.1/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..499c41b1a90
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-3.1/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-3.1"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-3.1",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-3.2/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-3.2/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..d7dcf893b9b
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-3.2/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-3.2"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-3.2",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-3.3/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-3.3/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..0e410d6d614
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-3.3/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-3.3"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-3.3",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-3.4/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-3.4/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..65cc4a70246
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-3.4/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-3.4"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-3.4",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-3.5/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-3.5/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..07b9c04e36a
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-3.5/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-3.5"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-3.5",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-3.6/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-3.6/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..c2ea8300cfd
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-3.6/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-3.6"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-3.6",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-3.7/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-3.7/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..a20aebc518a
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-3.7/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-3.7"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-3.7",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-3.8/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-3.8/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..94282c14463
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-3.8/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-3.8"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-3.8",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file
diff --git a/common/changes/@microsoft/rush-stack-compiler-3.9/octogonz-upgrade-ae_2020-07-03-03-23.json b/common/changes/@microsoft/rush-stack-compiler-3.9/octogonz-upgrade-ae_2020-07-03-03-23.json
new file mode 100644
index 00000000000..bd3eec6aeda
--- /dev/null
+++ b/common/changes/@microsoft/rush-stack-compiler-3.9/octogonz-upgrade-ae_2020-07-03-03-23.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Disable the \"--typescript-compiler-folder\" setting for API Extractor, since it was causing errors with the latest TypeScript engine",
+      "type": "minor",
+      "packageName": "@microsoft/rush-stack-compiler-3.9"
+    }
+  ],
+  "packageName": "@microsoft/rush-stack-compiler-3.9",
+  "email": "4673363+octogonz@users.noreply.github.com"
+}
\ No newline at end of file