diff --git a/tests/baselines/reference/computedPropertyNames3_ES5.errors.txt b/tests/baselines/reference/computedPropertyNames3_ES5.errors.txt
index fd6f8e8bdc1c6..86e363c937789 100644
--- a/tests/baselines/reference/computedPropertyNames3_ES5.errors.txt
+++ b/tests/baselines/reference/computedPropertyNames3_ES5.errors.txt
@@ -2,12 +2,13 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts(4,1
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts(5,9): error TS2378: A 'get' accessor must return a value.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts(5,9): error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts(5,17): error TS1102: 'delete' cannot be called on an identifier in strict mode.
+tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts(5,17): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts(6,9): error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts(7,16): error TS2378: A 'get' accessor must return a value.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts(7,16): error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
 
 
-==== tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts (7 errors) ====
+==== tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts (8 errors) ====
     var id;
     class C {
         [0 + 1]() { }
@@ -21,6 +22,8 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES5.ts(7,1
 !!! error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
                     ~~
 !!! error TS1102: 'delete' cannot be called on an identifier in strict mode.
+                    ~~
+!!! error TS2698: The operand of a delete operator must be a property reference
         set [[0, 1]](v) { }
             ~~~~~~~~
 !!! error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
diff --git a/tests/baselines/reference/computedPropertyNames3_ES6.errors.txt b/tests/baselines/reference/computedPropertyNames3_ES6.errors.txt
index 4299437777d5e..f287138661aaa 100644
--- a/tests/baselines/reference/computedPropertyNames3_ES6.errors.txt
+++ b/tests/baselines/reference/computedPropertyNames3_ES6.errors.txt
@@ -2,12 +2,13 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts(4,1
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts(5,9): error TS2378: A 'get' accessor must return a value.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts(5,9): error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts(5,17): error TS1102: 'delete' cannot be called on an identifier in strict mode.
+tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts(5,17): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts(6,9): error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts(7,16): error TS2378: A 'get' accessor must return a value.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts(7,16): error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
 
 
-==== tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts (7 errors) ====
+==== tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts (8 errors) ====
     var id;
     class C {
         [0 + 1]() { }
@@ -21,6 +22,8 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNames3_ES6.ts(7,1
 !!! error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
                     ~~
 !!! error TS1102: 'delete' cannot be called on an identifier in strict mode.
+                    ~~
+!!! error TS2698: The operand of a delete operator must be a property reference
         set [[0, 1]](v) { }
             ~~~~~~~~
 !!! error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
diff --git a/tests/baselines/reference/controlFlowDeleteOperator.errors.txt b/tests/baselines/reference/controlFlowDeleteOperator.errors.txt
new file mode 100644
index 0000000000000..720b368219c5d
--- /dev/null
+++ b/tests/baselines/reference/controlFlowDeleteOperator.errors.txt
@@ -0,0 +1,23 @@
+tests/cases/conformance/controlFlow/controlFlowDeleteOperator.ts(15,12): error TS2698: The operand of a delete operator must be a property reference
+
+
+==== tests/cases/conformance/controlFlow/controlFlowDeleteOperator.ts (1 errors) ====
+    
+    function f() {
+        let x: { a?: number | string, b: number | string } = { b: 1 };
+        x.a;
+        x.b;
+        x.a = 1;
+        x.b = 1;
+        x.a;
+        x.b;
+        delete x.a;
+        delete x.b;
+        x.a;
+        x.b;
+        x;
+        delete x;  // No effect
+               ~
+!!! error TS2698: The operand of a delete operator must be a property reference
+        x;
+    }
\ No newline at end of file
diff --git a/tests/baselines/reference/deleteOperator1.errors.txt b/tests/baselines/reference/deleteOperator1.errors.txt
index 964bdec9ea2ca..5cf2a63925d43 100644
--- a/tests/baselines/reference/deleteOperator1.errors.txt
+++ b/tests/baselines/reference/deleteOperator1.errors.txt
@@ -1,10 +1,19 @@
+tests/cases/compiler/deleteOperator1.ts(2,25): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/compiler/deleteOperator1.ts(3,21): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/compiler/deleteOperator1.ts(4,5): error TS2322: Type 'boolean' is not assignable to type 'number'.
+tests/cases/compiler/deleteOperator1.ts(4,24): error TS2698: The operand of a delete operator must be a property reference
 
 
-==== tests/cases/compiler/deleteOperator1.ts (1 errors) ====
+==== tests/cases/compiler/deleteOperator1.ts (4 errors) ====
     var a;
     var x: boolean = delete a;
+                            ~
+!!! error TS2698: The operand of a delete operator must be a property reference
     var y: any = delete a;
+                        ~
+!!! error TS2698: The operand of a delete operator must be a property reference
     var z: number = delete a;
         ~
-!!! error TS2322: Type 'boolean' is not assignable to type 'number'.
\ No newline at end of file
+!!! error TS2322: Type 'boolean' is not assignable to type 'number'.
+                           ~
+!!! error TS2698: The operand of a delete operator must be a property reference
\ No newline at end of file
diff --git a/tests/baselines/reference/deleteOperatorInStrictMode.errors.txt b/tests/baselines/reference/deleteOperatorInStrictMode.errors.txt
index 5952d8b829636..9d9e04d154c43 100644
--- a/tests/baselines/reference/deleteOperatorInStrictMode.errors.txt
+++ b/tests/baselines/reference/deleteOperatorInStrictMode.errors.txt
@@ -1,9 +1,12 @@
 tests/cases/compiler/deleteOperatorInStrictMode.ts(3,8): error TS1102: 'delete' cannot be called on an identifier in strict mode.
+tests/cases/compiler/deleteOperatorInStrictMode.ts(3,8): error TS2698: The operand of a delete operator must be a property reference
 
 
-==== tests/cases/compiler/deleteOperatorInStrictMode.ts (1 errors) ====
+==== tests/cases/compiler/deleteOperatorInStrictMode.ts (2 errors) ====
     "use strict"
     var a;
     delete a;
            ~
-!!! error TS1102: 'delete' cannot be called on an identifier in strict mode.
\ No newline at end of file
+!!! error TS1102: 'delete' cannot be called on an identifier in strict mode.
+           ~
+!!! error TS2698: The operand of a delete operator must be a property reference
\ No newline at end of file
diff --git a/tests/baselines/reference/deleteOperatorInvalidOperations.errors.txt b/tests/baselines/reference/deleteOperatorInvalidOperations.errors.txt
index d50be713d0a9a..2ff0c764c5193 100644
--- a/tests/baselines/reference/deleteOperatorInvalidOperations.errors.txt
+++ b/tests/baselines/reference/deleteOperatorInvalidOperations.errors.txt
@@ -1,10 +1,13 @@
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorInvalidOperations.ts(5,20): error TS1005: ',' expected.
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorInvalidOperations.ts(5,26): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorInvalidOperations.ts(5,27): error TS1109: Expression expected.
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorInvalidOperations.ts(8,22): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorInvalidOperations.ts(8,23): error TS1109: Expression expected.
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorInvalidOperations.ts(13,16): error TS1102: 'delete' cannot be called on an identifier in strict mode.
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorInvalidOperations.ts(13,16): error TS2698: The operand of a delete operator must be a property reference
 
 
-==== tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorInvalidOperations.ts (4 errors) ====
+==== tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorInvalidOperations.ts (7 errors) ====
     // Unary operator delete
     var ANY;
     
@@ -12,11 +15,15 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
     var BOOLEAN1 = ANY delete ;     //expect error
                        ~~~~~~
 !!! error TS1005: ',' expected.
+                             
+!!! error TS2698: The operand of a delete operator must be a property reference
                               ~
 !!! error TS1109: Expression expected.
     
     // miss an operand
     var BOOLEAN2 = delete ;
+                         
+!!! error TS2698: The operand of a delete operator must be a property reference
                           ~
 !!! error TS1109: Expression expected.
     
@@ -26,5 +33,7 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
             delete s;      //expect error
                    ~
 !!! error TS1102: 'delete' cannot be called on an identifier in strict mode.
+                   ~
+!!! error TS2698: The operand of a delete operator must be a property reference
         }
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/deleteOperatorWithAnyOtherType.errors.txt b/tests/baselines/reference/deleteOperatorWithAnyOtherType.errors.txt
index d92f1ffb1e763..64f41c84a0d94 100644
--- a/tests/baselines/reference/deleteOperatorWithAnyOtherType.errors.txt
+++ b/tests/baselines/reference/deleteOperatorWithAnyOtherType.errors.txt
@@ -1,23 +1,31 @@
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(25,31): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(26,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(27,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(28,31): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(29,31): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(30,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(33,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(34,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(42,32): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(43,32): error TS2698: The operand of a delete operator must be a property reference
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(44,32): error TS2698: The operand of a delete operator must be a property reference
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(45,32): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(44,33): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(45,33): error TS2365: Operator '+' cannot be applied to types 'undefined' and 'undefined'.
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(46,32): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(45,33): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(46,33): error TS2365: Operator '+' cannot be applied to types 'null' and 'null'.
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(47,32): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(46,33): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(47,33): error TS2365: Operator '+' cannot be applied to types 'undefined' and 'undefined'.
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(47,33): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(50,32): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(50,39): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(51,32): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(51,39): error TS2698: The operand of a delete operator must be a property reference
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(51,46): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(51,47): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(54,8): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(55,8): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts(57,8): error TS2698: The operand of a delete operator must be a property reference
 
 
-==== tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts (17 errors) ====
+==== tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithAnyOtherType.ts (25 errors) ====
     // delete  operator on any type
     
     var ANY: any;
@@ -43,7 +51,11 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
     
     // any type var
     var ResultIsBoolean1 = delete ANY1;
+                                  ~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean2 = delete ANY2;
+                                  ~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean3 = delete A;
                                   ~
 !!! error TS2698: The operand of a delete operator must be a property reference
@@ -51,7 +63,11 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
                                   ~
 !!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean5 = delete obj;
+                                  ~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean6 = delete obj1;
+                                  ~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     
     // any type literal
     var ResultIsBoolean7 = delete undefined;
@@ -74,41 +90,49 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
                                    ~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean16 = delete (ANY + ANY1);
-                                   ~~~~~~~~~~~~
+                                    ~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean17 = delete (null + undefined);
-                                   ~~~~~~~~~~~~~~~~~~
-!!! error TS2698: The operand of a delete operator must be a property reference
                                     ~~~~~~~~~~~~~~~~
 !!! error TS2365: Operator '+' cannot be applied to types 'undefined' and 'undefined'.
-    var ResultIsBoolean18 = delete (null + null);
-                                   ~~~~~~~~~~~~~
+                                    ~~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
+    var ResultIsBoolean18 = delete (null + null);
                                     ~~~~~~~~~~~
 !!! error TS2365: Operator '+' cannot be applied to types 'null' and 'null'.
-    var ResultIsBoolean19 = delete (undefined + undefined);
-                                   ~~~~~~~~~~~~~~~~~~~~~~~
+                                    ~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
+    var ResultIsBoolean19 = delete (undefined + undefined);
                                     ~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2365: Operator '+' cannot be applied to types 'undefined' and 'undefined'.
+                                    ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     
     // multiple delete  operators
     var ResultIsBoolean20 = delete delete ANY;
                                    ~~~~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
+                                          ~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean21 = delete delete delete (ANY + ANY1);
                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
                                           ~~~~~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
-                                                 ~~~~~~~~~~~~
+                                                  ~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     
     // miss assignment operators
     delete ANY;
+           ~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     delete ANY1;
+           ~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     delete ANY2[0];
     delete ANY, ANY1;
+           ~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     delete obj1.x;
     delete obj1.y;
     delete objA.a;
diff --git a/tests/baselines/reference/deleteOperatorWithBooleanType.errors.txt b/tests/baselines/reference/deleteOperatorWithBooleanType.errors.txt
index 3f653671e2ec8..5d65f8f718ab0 100644
--- a/tests/baselines/reference/deleteOperatorWithBooleanType.errors.txt
+++ b/tests/baselines/reference/deleteOperatorWithBooleanType.errors.txt
@@ -1,14 +1,17 @@
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(17,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(20,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(21,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(26,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(27,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(30,31): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(30,38): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(33,8): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(34,8): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(35,8): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts(36,8): error TS2698: The operand of a delete operator must be a property reference
 
 
-==== tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts (8 errors) ====
+==== tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithBooleanType.ts (11 errors) ====
     // delete  operator on boolean type
     var BOOLEAN: boolean;
     
@@ -26,6 +29,8 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
     
     // boolean type var
     var ResultIsBoolean1 = delete BOOLEAN;
+                                  ~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     
     // boolean type literal
     var ResultIsBoolean2 = delete true;
@@ -49,12 +54,16 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
     var ResultIsBoolean8 = delete delete BOOLEAN;
                                   ~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
+                                         ~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     
     // miss assignment operators
     delete true;
            ~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     delete BOOLEAN;
+           ~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     delete foo();
            ~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
diff --git a/tests/baselines/reference/deleteOperatorWithEnumType.errors.txt b/tests/baselines/reference/deleteOperatorWithEnumType.errors.txt
index 103070d15dc8e..f515e3b7b7071 100644
--- a/tests/baselines/reference/deleteOperatorWithEnumType.errors.txt
+++ b/tests/baselines/reference/deleteOperatorWithEnumType.errors.txt
@@ -1,12 +1,12 @@
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(7,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(8,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(11,31): error TS2699: The operand of a delete operator cannot be a read-only property
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(12,31): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(12,32): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(15,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(15,38): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(16,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(16,38): error TS2698: The operand of a delete operator must be a property reference
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(16,45): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(16,46): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(19,8): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(20,8): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithEnumType.ts(21,8): error TS2699: The operand of a delete operator cannot be a read-only property
@@ -32,7 +32,7 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
                                   ~~~~~~~~~~
 !!! error TS2699: The operand of a delete operator cannot be a read-only property
     var ResultIsBoolean4 = delete (ENUM[0] + ENUM1["B"]);
-                                  ~~~~~~~~~~~~~~~~~~~~~~
+                                   ~~~~~~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     
     // multiple delete  operators
@@ -46,7 +46,7 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
 !!! error TS2698: The operand of a delete operator must be a property reference
                                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
-                                                ~~~~~~~~~~~~~~~~~~~~~~
+                                                 ~~~~~~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     
     // miss assignment operators
diff --git a/tests/baselines/reference/deleteOperatorWithNumberType.errors.txt b/tests/baselines/reference/deleteOperatorWithNumberType.errors.txt
index bb35f3338b932..f908bee9686c5 100644
--- a/tests/baselines/reference/deleteOperatorWithNumberType.errors.txt
+++ b/tests/baselines/reference/deleteOperatorWithNumberType.errors.txt
@@ -1,18 +1,23 @@
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(18,31): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(19,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(22,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(23,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(24,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(30,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(31,32): error TS2698: The operand of a delete operator must be a property reference
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(32,32): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(32,33): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(35,32): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(35,39): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(36,32): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(36,39): error TS2698: The operand of a delete operator must be a property reference
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(36,46): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(36,47): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(39,8): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(40,8): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(41,8): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts(42,8): error TS2698: The operand of a delete operator must be a property reference
 
 
-==== tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts (12 errors) ====
+==== tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithNumberType.ts (17 errors) ====
     // delete  operator on number type
     var NUMBER: number;
     var NUMBER1: number[] = [1, 2];
@@ -31,7 +36,11 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
     
     // number type var
     var ResultIsBoolean1 = delete NUMBER;
+                                  ~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean2 = delete NUMBER1;
+                                  ~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     
     // number type literal
     var ResultIsBoolean3 = delete 1;
@@ -55,19 +64,21 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
                                    ~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean11 = delete (NUMBER + NUMBER);
-                                   ~~~~~~~~~~~~~~~~~
+                                    ~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     
     // multiple delete  operator
     var ResultIsBoolean12 = delete delete NUMBER;
                                    ~~~~~~~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
+                                          ~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean13 = delete delete delete (NUMBER + NUMBER);
                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
                                           ~~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
-                                                 ~~~~~~~~~~~~~~~~~
+                                                  ~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     
     // miss assignment operators
@@ -75,7 +86,11 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
            ~
 !!! error TS2698: The operand of a delete operator must be a property reference
     delete NUMBER;
+           ~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     delete NUMBER1;
+           ~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     delete foo();
            ~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
diff --git a/tests/baselines/reference/deleteOperatorWithStringType.errors.txt b/tests/baselines/reference/deleteOperatorWithStringType.errors.txt
index 9ffde0a8f97cb..c15e6b47433f9 100644
--- a/tests/baselines/reference/deleteOperatorWithStringType.errors.txt
+++ b/tests/baselines/reference/deleteOperatorWithStringType.errors.txt
@@ -1,19 +1,24 @@
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(18,31): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(19,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(22,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(23,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(24,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(30,31): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(31,32): error TS2698: The operand of a delete operator must be a property reference
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(32,32): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(32,33): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(33,32): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(36,32): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(36,39): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(37,32): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(37,39): error TS2698: The operand of a delete operator must be a property reference
-tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(37,46): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(37,47): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(40,8): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(41,8): error TS2698: The operand of a delete operator must be a property reference
+tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(42,8): error TS2698: The operand of a delete operator must be a property reference
 tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts(43,8): error TS2698: The operand of a delete operator must be a property reference
 
 
-==== tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts (13 errors) ====
+==== tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperatorWithStringType.ts (18 errors) ====
     // delete  operator on string type
     var STRING: string;
     var STRING1: string[] = ["", "abc"];
@@ -32,7 +37,11 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
     
     // string type var
     var ResultIsBoolean1 = delete STRING;
+                                  ~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean2 = delete STRING1;
+                                  ~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     
     // string type literal
     var ResultIsBoolean3 = delete "";
@@ -56,7 +65,7 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
                                    ~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean11 = delete (STRING + STRING);
-                                   ~~~~~~~~~~~~~~~~~
+                                    ~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean12 = delete STRING.charAt(0);
                                    ~~~~~~~~~~~~~~~~
@@ -65,13 +74,15 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
     // multiple delete  operator
     var ResultIsBoolean13 = delete delete STRING;
                                    ~~~~~~~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
+                                          ~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     var ResultIsBoolean14 = delete delete delete (STRING + STRING);
                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
                                           ~~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
-                                                 ~~~~~~~~~~~~~~~~~
+                                                  ~~~~~~~~~~~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     
     // miss assignment operators
@@ -79,7 +90,11 @@ tests/cases/conformance/expressions/unaryOperators/deleteOperator/deleteOperator
            ~~
 !!! error TS2698: The operand of a delete operator must be a property reference
     delete STRING;
+           ~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     delete STRING1;
+           ~~~~~~~
+!!! error TS2698: The operand of a delete operator must be a property reference
     delete foo();
            ~~~~~
 !!! error TS2698: The operand of a delete operator must be a property reference
diff --git a/tests/baselines/reference/deleteReadonly.errors.txt b/tests/baselines/reference/deleteReadonly.errors.txt
index c0fc3ee7dc396..1846f139d86a3 100644
--- a/tests/baselines/reference/deleteReadonly.errors.txt
+++ b/tests/baselines/reference/deleteReadonly.errors.txt
@@ -1,8 +1,9 @@
 tests/cases/compiler/deleteReadonly.ts(8,8): error TS2699: The operand of a delete operator cannot be a read-only property
-tests/cases/compiler/deleteReadonly.ts(18,8): error TS2699: The operand of a delete operator cannot be a read-only property
+tests/cases/compiler/deleteReadonly.ts(18,8): error TS2542: Index signature in type 'B' only permits reading.
+tests/cases/compiler/deleteReadonly.ts(20,12): error TS2542: Index signature in type 'B' only permits reading.
 
 
-==== tests/cases/compiler/deleteReadonly.ts (2 errors) ====
+==== tests/cases/compiler/deleteReadonly.ts (3 errors) ====
     interface A {
       readonly b
     }
@@ -24,5 +25,9 @@ tests/cases/compiler/deleteReadonly.ts(18,8): error TS2699: The operand of a del
     
     delete b['test'];
            ~~~~~~~~~
-!!! error TS2699: The operand of a delete operator cannot be a read-only property
+!!! error TS2542: Index signature in type 'B' only permits reading.
+    
+    delete ((((b['test']))));
+               ~~~~~~~~~
+!!! error TS2542: Index signature in type 'B' only permits reading.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/deleteReadonly.js b/tests/baselines/reference/deleteReadonly.js
index fd16bf270f69c..bdfdf155546de 100644
--- a/tests/baselines/reference/deleteReadonly.js
+++ b/tests/baselines/reference/deleteReadonly.js
@@ -17,6 +17,8 @@ var b: B = {
 };
 
 delete b['test'];
+
+delete ((((b['test']))));
 
 
 //// [deleteReadonly.js]
@@ -28,3 +30,4 @@ var b = {
     'test': 'test'
 };
 delete b['test'];
+delete ((((b['test']))));
diff --git a/tests/baselines/reference/parserStrictMode15.errors.txt b/tests/baselines/reference/parserStrictMode15.errors.txt
index 0bcaaf337860e..8217590123616 100644
--- a/tests/baselines/reference/parserStrictMode15.errors.txt
+++ b/tests/baselines/reference/parserStrictMode15.errors.txt
@@ -1,11 +1,14 @@
 tests/cases/conformance/parser/ecmascript5/StrictMode/parserStrictMode15.ts(2,8): error TS1102: 'delete' cannot be called on an identifier in strict mode.
 tests/cases/conformance/parser/ecmascript5/StrictMode/parserStrictMode15.ts(2,8): error TS2304: Cannot find name 'a'.
+tests/cases/conformance/parser/ecmascript5/StrictMode/parserStrictMode15.ts(2,8): error TS2698: The operand of a delete operator must be a property reference
 
 
-==== tests/cases/conformance/parser/ecmascript5/StrictMode/parserStrictMode15.ts (2 errors) ====
+==== tests/cases/conformance/parser/ecmascript5/StrictMode/parserStrictMode15.ts (3 errors) ====
     "use strict";
     delete a;
            ~
 !!! error TS1102: 'delete' cannot be called on an identifier in strict mode.
            ~
-!!! error TS2304: Cannot find name 'a'.
\ No newline at end of file
+!!! error TS2304: Cannot find name 'a'.
+           ~
+!!! error TS2698: The operand of a delete operator must be a property reference
\ No newline at end of file
diff --git a/tests/cases/compiler/deleteReadonly.ts b/tests/cases/compiler/deleteReadonly.ts
index b7d35b3261b48..cdab3f2eb234d 100644
--- a/tests/cases/compiler/deleteReadonly.ts
+++ b/tests/cases/compiler/deleteReadonly.ts
@@ -16,3 +16,5 @@ var b: B = {
 };
 
 delete b['test'];
+
+delete ((((b['test']))));