microsoft · RyanCavanaugh · Apr 2, 2026 · Apr 2, 2026 · Apr 2, 2026 · Apr 2, 2026
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
@@ -1111,7 +1111,7 @@
         "category": "Error",
         "code": 1343
     },
-    "'A label is not allowed here.": {
+    "A label is not allowed here.": {
         "category": "Error",
         "code": 1344
     },

diff --git a/tests/baselines/reference/ambientWithStatements(alwaysstrict=true).errors.txt b/tests/baselines/reference/ambientWithStatements(alwaysstrict=true).errors.txt
@@ -1,6 +1,6 @@
 ambientWithStatements.ts(2,5): error TS1036: Statements are not allowed in ambient contexts.
 ambientWithStatements.ts(3,5): error TS1104: A 'continue' statement can only be used within an enclosing iteration statement.
-ambientWithStatements.ts(10,5): error TS1344: 'A label is not allowed here.
+ambientWithStatements.ts(10,5): error TS1344: A label is not allowed here.
 ambientWithStatements.ts(11,5): error TS1108: A 'return' statement can only be used within a function body.
 ambientWithStatements.ts(25,5): error TS1101: 'with' statements are not allowed in strict mode.
 ambientWithStatements.ts(25,5): error TS2410: The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'.
@@ -22,7 +22,7 @@ ambientWithStatements.ts(25,5): error TS2410: The 'with' statement is not suppor
         1;
         L: var y;
         ~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
         return;
         ~~~~~~
 !!! error TS1108: A 'return' statement can only be used within a function body.

diff --git a/tests/baselines/reference/constDeclarations-invalidContexts(alwaysstrict=true).errors.txt b/tests/baselines/reference/constDeclarations-invalidContexts(alwaysstrict=true).errors.txt
@@ -6,9 +6,9 @@ constDeclarations-invalidContexts.ts(15,1): error TS1101: 'with' statements are
 constDeclarations-invalidContexts.ts(15,1): error TS2410: The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'.
 constDeclarations-invalidContexts.ts(19,5): error TS1156: 'const' declarations can only be declared inside a block.
 constDeclarations-invalidContexts.ts(22,5): error TS1156: 'const' declarations can only be declared inside a block.
-constDeclarations-invalidContexts.ts(25,5): error TS1344: 'A label is not allowed here.
+constDeclarations-invalidContexts.ts(25,5): error TS1344: A label is not allowed here.
 constDeclarations-invalidContexts.ts(25,12): error TS1156: 'const' declarations can only be declared inside a block.
-constDeclarations-invalidContexts.ts(28,21): error TS1344: 'A label is not allowed here.
+constDeclarations-invalidContexts.ts(28,21): error TS1344: A label is not allowed here.
 constDeclarations-invalidContexts.ts(28,29): error TS1156: 'const' declarations can only be declared inside a block.
 
 
@@ -55,14 +55,14 @@ constDeclarations-invalidContexts.ts(28,29): error TS1156: 'const' declarations
     if (true) 
         label: const c8 = 0;
         ~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
                ~~~~~~~~~~~~~
 !!! error TS1156: 'const' declarations can only be declared inside a block.
 
     while (false)
         label2: label3: label4: const c9 = 0;
                         ~~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
                                 ~~~~~~~~~~~~~
 !!! error TS1156: 'const' declarations can only be declared inside a block.
 

diff --git a/tests/baselines/reference/constDeclarations-scopes(alwaysstrict=true).errors.txt b/tests/baselines/reference/constDeclarations-scopes(alwaysstrict=true).errors.txt
@@ -1,7 +1,7 @@
 constDeclarations-scopes.ts(27,1): error TS1101: 'with' statements are not allowed in strict mode.
 constDeclarations-scopes.ts(27,1): error TS2410: The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'.
-constDeclarations-scopes.ts(43,5): error TS1344: 'A label is not allowed here.
-constDeclarations-scopes.ts(48,21): error TS1344: 'A label is not allowed here.
+constDeclarations-scopes.ts(43,5): error TS1344: A label is not allowed here.
+constDeclarations-scopes.ts(48,21): error TS1344: A label is not allowed here.
 
 
 ==== constDeclarations-scopes.ts (4 errors) ====
@@ -53,14 +53,14 @@ constDeclarations-scopes.ts(48,21): error TS1344: 'A label is not allowed here.
     if (true) {
         label: const c = 0;
         ~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
         n = c;
     }
 
     while (false) {
         label2: label3: label4: const c = 0;
                         ~~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
         n = c;
     }
 

diff --git a/tests/baselines/reference/constDeclarations-validContexts(alwaysstrict=true).errors.txt b/tests/baselines/reference/constDeclarations-validContexts(alwaysstrict=true).errors.txt
@@ -1,8 +1,8 @@
 constDeclarations-validContexts.ts(18,1): error TS1101: 'with' statements are not allowed in strict mode.
 constDeclarations-validContexts.ts(18,1): error TS2410: The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'.
-constDeclarations-validContexts.ts(31,5): error TS1344: 'A label is not allowed here.
-constDeclarations-validContexts.ts(35,21): error TS1344: 'A label is not allowed here.
-constDeclarations-validContexts.ts(64,9): error TS1344: 'A label is not allowed here.
+constDeclarations-validContexts.ts(31,5): error TS1344: A label is not allowed here.
+constDeclarations-validContexts.ts(35,21): error TS1344: A label is not allowed here.
+constDeclarations-validContexts.ts(64,9): error TS1344: A label is not allowed here.
 
 
 ==== constDeclarations-validContexts.ts (5 errors) ====
@@ -42,13 +42,13 @@ constDeclarations-validContexts.ts(64,9): error TS1344: 'A label is not allowed
     if (true) {
         label: const c8 = 0;
         ~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     }
 
     while (false) {
         label2: label3: label4: const c9 = 0;
                         ~~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     }
 
     // Try/catch/finally
@@ -79,7 +79,7 @@ constDeclarations-validContexts.ts(64,9): error TS1344: 'A label is not allowed
             const c16 = 0
             label17: const c17 = 0;
             ~~~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
         }
     }
 

diff --git a/tests/baselines/reference/invalidDoWhileBreakStatements.errors.txt b/tests/baselines/reference/invalidDoWhileBreakStatements.errors.txt
@@ -3,7 +3,7 @@ invalidDoWhileBreakStatements.ts(8,4): error TS1116: A 'break' statement can onl
 invalidDoWhileBreakStatements.ts(14,9): error TS1107: Jump target cannot cross function boundary.
 invalidDoWhileBreakStatements.ts(21,9): error TS1107: Jump target cannot cross function boundary.
 invalidDoWhileBreakStatements.ts(27,5): error TS1116: A 'break' statement can only jump to a label of an enclosing statement.
-invalidDoWhileBreakStatements.ts(33,1): error TS1344: 'A label is not allowed here.
+invalidDoWhileBreakStatements.ts(33,1): error TS1344: A label is not allowed here.
 invalidDoWhileBreakStatements.ts(37,5): error TS1116: A 'break' statement can only jump to a label of an enclosing statement.
 
 
@@ -52,7 +52,7 @@ invalidDoWhileBreakStatements.ts(37,5): error TS1116: A 'break' statement can on
     // label on non-loop statement
     NINE:
     ~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     var y = 12;
 
     do {

diff --git a/tests/baselines/reference/invalidDoWhileContinueStatements.errors.txt b/tests/baselines/reference/invalidDoWhileContinueStatements.errors.txt
@@ -3,7 +3,7 @@ invalidDoWhileContinueStatements.ts(8,4): error TS1115: A 'continue' statement c
 invalidDoWhileContinueStatements.ts(14,9): error TS1107: Jump target cannot cross function boundary.
 invalidDoWhileContinueStatements.ts(21,9): error TS1107: Jump target cannot cross function boundary.
 invalidDoWhileContinueStatements.ts(27,5): error TS1115: A 'continue' statement can only jump to a label of an enclosing iteration statement.
-invalidDoWhileContinueStatements.ts(33,1): error TS1344: 'A label is not allowed here.
+invalidDoWhileContinueStatements.ts(33,1): error TS1344: A label is not allowed here.
 invalidDoWhileContinueStatements.ts(37,5): error TS1115: A 'continue' statement can only jump to a label of an enclosing iteration statement.
 
 
@@ -52,7 +52,7 @@ invalidDoWhileContinueStatements.ts(37,5): error TS1115: A 'continue' statement
     // label on non-loop statement
     NINE:
     ~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     var y = 12;
 
     do {

diff --git a/tests/baselines/reference/invalidForBreakStatements.errors.txt b/tests/baselines/reference/invalidForBreakStatements.errors.txt
@@ -3,7 +3,7 @@ invalidForBreakStatements.ts(8,9): error TS1116: A 'break' statement can only ju
 invalidForBreakStatements.ts(14,9): error TS1107: Jump target cannot cross function boundary.
 invalidForBreakStatements.ts(21,9): error TS1107: Jump target cannot cross function boundary.
 invalidForBreakStatements.ts(27,5): error TS1116: A 'break' statement can only jump to a label of an enclosing statement.
-invalidForBreakStatements.ts(32,1): error TS1344: 'A label is not allowed here.
+invalidForBreakStatements.ts(32,1): error TS1344: A label is not allowed here.
 invalidForBreakStatements.ts(36,5): error TS1116: A 'break' statement can only jump to a label of an enclosing statement.
 
 
@@ -51,7 +51,7 @@ invalidForBreakStatements.ts(36,5): error TS1116: A 'break' statement can only j
     // label on non-loop statement
     NINE:
     ~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     var y = 12;
 
     for(;;) {

diff --git a/tests/baselines/reference/invalidForContinueStatements.errors.txt b/tests/baselines/reference/invalidForContinueStatements.errors.txt
@@ -3,7 +3,7 @@ invalidForContinueStatements.ts(8,9): error TS1115: A 'continue' statement can o
 invalidForContinueStatements.ts(14,9): error TS1107: Jump target cannot cross function boundary.
 invalidForContinueStatements.ts(21,9): error TS1107: Jump target cannot cross function boundary.
 invalidForContinueStatements.ts(27,5): error TS1115: A 'continue' statement can only jump to a label of an enclosing iteration statement.
-invalidForContinueStatements.ts(32,1): error TS1344: 'A label is not allowed here.
+invalidForContinueStatements.ts(32,1): error TS1344: A label is not allowed here.
 invalidForContinueStatements.ts(36,5): error TS1115: A 'continue' statement can only jump to a label of an enclosing iteration statement.
 
 
@@ -51,7 +51,7 @@ invalidForContinueStatements.ts(36,5): error TS1115: A 'continue' statement can
     // label on non-loop statement
     NINE:
     ~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     var y = 12;
 
     for(;;) {

diff --git a/tests/baselines/reference/invalidForInBreakStatements.errors.txt b/tests/baselines/reference/invalidForInBreakStatements.errors.txt
@@ -3,7 +3,7 @@ invalidForInBreakStatements.ts(8,19): error TS1116: A 'break' statement can only
 invalidForInBreakStatements.ts(14,9): error TS1107: Jump target cannot cross function boundary.
 invalidForInBreakStatements.ts(21,9): error TS1107: Jump target cannot cross function boundary.
 invalidForInBreakStatements.ts(27,5): error TS1116: A 'break' statement can only jump to a label of an enclosing statement.
-invalidForInBreakStatements.ts(33,1): error TS1344: 'A label is not allowed here.
+invalidForInBreakStatements.ts(33,1): error TS1344: A label is not allowed here.
 invalidForInBreakStatements.ts(37,5): error TS1116: A 'break' statement can only jump to a label of an enclosing statement.
 
 
@@ -52,7 +52,7 @@ invalidForInBreakStatements.ts(37,5): error TS1116: A 'break' statement can only
     // label on non-loop statement
     NINE:
     ~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     var y = 12;
 
     for (var x in {}) {

diff --git a/tests/baselines/reference/invalidForInContinueStatements.errors.txt b/tests/baselines/reference/invalidForInContinueStatements.errors.txt
@@ -3,7 +3,7 @@ invalidForInContinueStatements.ts(8,19): error TS1115: A 'continue' statement ca
 invalidForInContinueStatements.ts(14,9): error TS1107: Jump target cannot cross function boundary.
 invalidForInContinueStatements.ts(21,9): error TS1107: Jump target cannot cross function boundary.
 invalidForInContinueStatements.ts(27,5): error TS1115: A 'continue' statement can only jump to a label of an enclosing iteration statement.
-invalidForInContinueStatements.ts(33,1): error TS1344: 'A label is not allowed here.
+invalidForInContinueStatements.ts(33,1): error TS1344: A label is not allowed here.
 invalidForInContinueStatements.ts(37,5): error TS1115: A 'continue' statement can only jump to a label of an enclosing iteration statement.
 
 
@@ -52,7 +52,7 @@ invalidForInContinueStatements.ts(37,5): error TS1115: A 'continue' statement ca
     // label on non-loop statement
     NINE:
     ~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     var y = 12;
 
     for (var x in {}) {

diff --git a/tests/baselines/reference/invalidWhileBreakStatements.errors.txt b/tests/baselines/reference/invalidWhileBreakStatements.errors.txt
@@ -3,7 +3,7 @@ invalidWhileBreakStatements.ts(8,14): error TS1116: A 'break' statement can only
 invalidWhileBreakStatements.ts(14,9): error TS1107: Jump target cannot cross function boundary.
 invalidWhileBreakStatements.ts(21,9): error TS1107: Jump target cannot cross function boundary.
 invalidWhileBreakStatements.ts(27,5): error TS1116: A 'break' statement can only jump to a label of an enclosing statement.
-invalidWhileBreakStatements.ts(33,1): error TS1344: 'A label is not allowed here.
+invalidWhileBreakStatements.ts(33,1): error TS1344: A label is not allowed here.
 invalidWhileBreakStatements.ts(37,5): error TS1116: A 'break' statement can only jump to a label of an enclosing statement.
 
 
@@ -52,7 +52,7 @@ invalidWhileBreakStatements.ts(37,5): error TS1116: A 'break' statement can only
     // label on non-loop statement
     NINE:
     ~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     var y = 12;
 
     while (true) {

diff --git a/tests/baselines/reference/invalidWhileContinueStatements.errors.txt b/tests/baselines/reference/invalidWhileContinueStatements.errors.txt
@@ -3,7 +3,7 @@ invalidWhileContinueStatements.ts(8,14): error TS1115: A 'continue' statement ca
 invalidWhileContinueStatements.ts(14,9): error TS1107: Jump target cannot cross function boundary.
 invalidWhileContinueStatements.ts(21,9): error TS1107: Jump target cannot cross function boundary.
 invalidWhileContinueStatements.ts(27,5): error TS1115: A 'continue' statement can only jump to a label of an enclosing iteration statement.
-invalidWhileContinueStatements.ts(33,1): error TS1344: 'A label is not allowed here.
+invalidWhileContinueStatements.ts(33,1): error TS1344: A label is not allowed here.
 invalidWhileContinueStatements.ts(37,5): error TS1115: A 'continue' statement can only jump to a label of an enclosing iteration statement.
 
 
@@ -52,7 +52,7 @@ invalidWhileContinueStatements.ts(37,5): error TS1115: A 'continue' statement ca
     // label on non-loop statement
     NINE:
     ~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     var y = 12;
 
     while (true) {

diff --git a/...baselines/reference/jsFileCompilationBindReachabilityErrors(alwaysstrict=true).errors.txt b/...baselines/reference/jsFileCompilationBindReachabilityErrors(alwaysstrict=true).errors.txt
@@ -1,6 +1,6 @@
 a.js(3,9): error TS7029: Fallthrough case in switch.
 a.js(16,5): error TS7027: Unreachable code detected.
-a.js(19,1): error TS1344: 'A label is not allowed here.
+a.js(19,1): error TS1344: A label is not allowed here.
 a.js(19,1): error TS7028: Unused label.
 
 
@@ -29,6 +29,6 @@ a.js(19,1): error TS7028: Unused label.
 
     label1:  var x2 = 10;
     ~~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     ~~~~~~
 !!! error TS7028: Unused label.
diff --git a/...selines/reference/labeledStatementDeclarationListInLoopNoCrash1(target=es2015).errors.txt b/...selines/reference/labeledStatementDeclarationListInLoopNoCrash1(target=es2015).errors.txt
@@ -1,4 +1,4 @@
-labeledStatementDeclarationListInLoopNoCrash1.ts(3,3): error TS1344: 'A label is not allowed here.
+labeledStatementDeclarationListInLoopNoCrash1.ts(3,3): error TS1344: A label is not allowed here.
 labeledStatementDeclarationListInLoopNoCrash1.ts(3,11): error TS1123: Variable declaration list cannot be empty.
 
 
@@ -7,7 +7,7 @@ labeledStatementDeclarationListInLoopNoCrash1.ts(3,11): error TS1123: Variable d
       var v0 = x;
       foo: var;
       ~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
 
 !!! error TS1123: Variable declaration list cannot be empty.
       (function() { return x + v0});

diff --git a/...selines/reference/labeledStatementDeclarationListInLoopNoCrash2(target=es2015).errors.txt b/...selines/reference/labeledStatementDeclarationListInLoopNoCrash2(target=es2015).errors.txt
@@ -1,12 +1,12 @@
-labeledStatementDeclarationListInLoopNoCrash2.ts(3,3): error TS1344: 'A label is not allowed here.
+labeledStatementDeclarationListInLoopNoCrash2.ts(3,3): error TS1344: A label is not allowed here.
 
 
 ==== labeledStatementDeclarationListInLoopNoCrash2.ts (1 errors) ====
     for (let x of []) {
       var v0 = x;
       foo: var y;
       ~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
       (function() { return x + v0});
     }
 
diff --git a/...selines/reference/labeledStatementDeclarationListInLoopNoCrash3(target=es2015).errors.txt b/...selines/reference/labeledStatementDeclarationListInLoopNoCrash3(target=es2015).errors.txt
@@ -9,7 +9,7 @@ labeledStatementDeclarationListInLoopNoCrash3.ts(15,42): error TS1005: ')' expec
 labeledStatementDeclarationListInLoopNoCrash3.ts(15,53): error TS2304: Cannot find name 'fontSize'.
 labeledStatementDeclarationListInLoopNoCrash3.ts(15,61): error TS1005: ';' expected.
 labeledStatementDeclarationListInLoopNoCrash3.ts(16,12): error TS1005: ';' expected.
-labeledStatementDeclarationListInLoopNoCrash3.ts(16,12): error TS1344: 'A label is not allowed here.
+labeledStatementDeclarationListInLoopNoCrash3.ts(16,12): error TS1344: A label is not allowed here.
 labeledStatementDeclarationListInLoopNoCrash3.ts(16,23): error TS1134: Variable declaration expected.
 labeledStatementDeclarationListInLoopNoCrash3.ts(16,38): error TS2592: Cannot find name '$'. Do you need to install type definitions for jQuery? Try `npm i --save-dev @types/jquery` and then add 'jquery' to the types field in your tsconfig.
 labeledStatementDeclarationListInLoopNoCrash3.ts(16,39): error TS1005: ')' expected.
@@ -58,7 +58,7 @@ labeledStatementDeclarationListInLoopNoCrash3.ts(22,1): error TS1160: Unterminat
                ~~~~~~
 !!! error TS1005: ';' expected.
                ~~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
                           ~
 !!! error TS1134: Variable declaration expected.
                                          ~

diff --git a/...selines/reference/labeledStatementDeclarationListInLoopNoCrash4(target=es2015).errors.txt b/...selines/reference/labeledStatementDeclarationListInLoopNoCrash4(target=es2015).errors.txt
@@ -9,7 +9,7 @@ labeledStatementDeclarationListInLoopNoCrash4.ts(13,42): error TS1005: ')' expec
 labeledStatementDeclarationListInLoopNoCrash4.ts(13,53): error TS2304: Cannot find name 'fontSize'.
 labeledStatementDeclarationListInLoopNoCrash4.ts(13,61): error TS1005: ';' expected.
 labeledStatementDeclarationListInLoopNoCrash4.ts(14,12): error TS1005: ';' expected.
-labeledStatementDeclarationListInLoopNoCrash4.ts(14,12): error TS1344: 'A label is not allowed here.
+labeledStatementDeclarationListInLoopNoCrash4.ts(14,12): error TS1344: A label is not allowed here.
 labeledStatementDeclarationListInLoopNoCrash4.ts(14,27): error TS1005: ',' expected.
 labeledStatementDeclarationListInLoopNoCrash4.ts(20,1): error TS1005: '}' expected.
 labeledStatementDeclarationListInLoopNoCrash4.ts(20,1): error TS1160: Unterminated template literal.
@@ -53,7 +53,7 @@ labeledStatementDeclarationListInLoopNoCrash4.ts(20,1): error TS1160: Unterminat
                ~~~~~~
 !!! error TS1005: ';' expected.
                ~~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
                               ~~
             ].join(';')
     ~~~~~~~~~~~~~~~~~~~

diff --git a/...baselines/reference/labeledStatementExportDeclarationNoCrash1(module=commonjs).errors.txt b/...baselines/reference/labeledStatementExportDeclarationNoCrash1(module=commonjs).errors.txt
@@ -1,5 +1,5 @@
 labeledStatementExportDeclarationNoCrash1.ts(3,14): error TS1155: 'const' declarations must be initialized.
-labeledStatementExportDeclarationNoCrash1.ts(4,1): error TS1344: 'A label is not allowed here.
+labeledStatementExportDeclarationNoCrash1.ts(4,1): error TS1344: A label is not allowed here.
 labeledStatementExportDeclarationNoCrash1.ts(5,1): error TS1184: Modifiers cannot appear here.
 labeledStatementExportDeclarationNoCrash1.ts(5,14): error TS1155: 'const' declarations must be initialized.
 
@@ -12,7 +12,7 @@ labeledStatementExportDeclarationNoCrash1.ts(5,14): error TS1155: 'const' declar
 !!! error TS1155: 'const' declarations must be initialized.
     subTitle:
     ~~~~~~~~
-!!! error TS1344: 'A label is not allowed here.
+!!! error TS1344: A label is not allowed here.
     export const title: string
     ~~~~~~
 !!! error TS1184: Modifiers cannot appear here.