From d3324f4efa4a50a8beb5d1e02590fa26731eb0ae Mon Sep 17 00:00:00 2001
From: Katie Byers <lobsterkatie@gmail.com>
Date: Tue, 25 Oct 2022 15:36:44 -0700
Subject: [PATCH] prevent rollup from adding `[Symbol.toStringTag]: 'Module'`
 to CJS files

---
 rollup/npmHelpers.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/rollup/npmHelpers.js b/rollup/npmHelpers.js
index b7d0fd187e14..e1657f7ef598 100644
--- a/rollup/npmHelpers.js
+++ b/rollup/npmHelpers.js
@@ -44,8 +44,14 @@ export function makeBaseNPMConfig(options = {}) {
       // output individual files rather than one big bundle
       preserveModules: true,
 
-      // any wrappers or helper functions generated by rollup can use ES6 features
-      generatedCode: 'es2015',
+      // Allow wrappers or helper functions generated by rollup to use any ES6 features except symbols. (Symbols in
+      // general are fine, but the `[Symbol.toStringTag]: 'Module'` which Rollup adds alongside `__esModule:
+      // true` in CJS modules makes it so that Jest <= 29.2.2 crashes when trying to mock generated `@sentry/xxx`
+      // packages. See https://github.com/getsentry/sentry-javascript/pull/6043.)
+      generatedCode: {
+        preset: 'es2015',
+        symbols: false,
+      },
 
       // don't add `"use strict"` to the top of cjs files
       strict: false,