wheercool
diff --git a/‎src/compiler/parser.ts
Lines changed: 21 additions & 19 deletions b/‎src/compiler/parser.ts
Lines changed: 21 additions & 19 deletions
diff --git a/‎tests/baselines/reference/arrowFunctionsMissingTokens.errors.txt
Lines changed: 1 addition & 1 deletion b/‎tests/baselines/reference/arrowFunctionsMissingTokens.errors.txt
Lines changed: 1 addition & 1 deletion
diff --git a/‎tests/cases/compiler/arrowFunctionsMissingTokens.ts
Lines changed: 1 addition & 1 deletion b/‎tests/cases/compiler/arrowFunctionsMissingTokens.ts
Lines changed: 1 addition & 1 deletion
@@ -1468,14 +1468,14 @@ module ts {
 
             // *Maybe* we had an arrow function and we need to try to parse it out,
             // rolling back and trying other parses if we fail.
-            var sig = tryParse(parseSignatureIfArrowOrBraceFollows);
-            if (sig === undefined) {
-                return undefined;
-            }
-            else {
+            var sig = tryParseSignatureIfArrowOrBraceFollows();
+            if (sig) {
                 parseExpected(SyntaxKind.EqualsGreaterThanToken);
                 return parseArrowExpressionTail(pos, sig, /*noIn:*/ false);
             }
+            else {
+                return undefined;
+            }
         }
 
         //  True        -> We definitely expect a parenthesized arrow function here.
@@ -1549,22 +1549,24 @@ module ts {
             return Tristate.False;
         }
 
- 
10000
       function parseSignatureIfArrowOrBraceFollows(): ParsedSignature {
-            var sig = parseSignature(SyntaxKind.CallSignature, SyntaxKind.ColonToken);
+        function tryParseSignatureIfArrowOrBraceFollows(): ParsedSignature {
+            return tryParse(() => {
+                var sig = parseSignature(SyntaxKind.CallSignature, SyntaxKind.ColonToken);
 
-            // Parsing a signature isn't enough.
-            // Parenthesized arrow signatures often look like other valid expressions.
-            // For instance:
-            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
-            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
-            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
-            //
-            // So we need just a bit of lookahead to ensure that it can only be a signature.
-            if (token === SyntaxKind.EqualsGreaterThanToken || token === SyntaxKind.OpenBraceToken) {
-                return sig;
-            }
+                // Parsing a signature isn't enough.
+                // Parenthesized arrow signatures often look like other valid expressions.
+                // For instance:
+                //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
+                //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
+                //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
+                //
+                // So we need just a bit of lookahead to ensure that it can only be a signature.
+                if (token === SyntaxKind.EqualsGreaterThanToken || token === SyntaxKind.OpenBraceToken) {
+                    return sig;
+                }
 
-            return undefined;
+                return undefined;
+            });
         }
 
         function parseArrowExpressionTail(pos: number, sig: ParsedSignature, noIn: boolean): FunctionExpression {
 
@@ -80,7 +80,7 @@
     ~
 !!! Declaration or statement expected.
 
-    module ceci_nEst_pas_une_arrow_function {
+    module ce_nEst_pas_une_arrow_function {
         var a = ();
                  ~
 !!! Expression expected.
 
@@ -41,7 +41,7 @@ module missingCurliesWithArrow {
     }
 }
 
-module ceci_nEst_pas_une_arrow_function {
+module ce_nEst_pas_une_arrow_function {
     var a = ();
 
     var b = (): void;
Original file line number	Diff line number	Diff line change
`@@ -80,7 +80,7 @@`
`80`	`80`	`~`
`81`	`81`	`!!! Declaration or statement expected.`
`82`	`82`
`83`		`- module ceci_nEst_pas_une_arrow_function {`
	`83`	`+ module ce_nEst_pas_une_arrow_function {`
`84`	`84`	`var a = ();`
`85`	`85`	`~`
`86`	`86`	`!!! Expression expected.`
Original file line number	Diff line number	Diff line change
`@@ -41,7 +41,7 @@ module missingCurliesWithArrow {`
`41`	`41`	`}`
`42`	`42`	`}`
`43`	`43`
`44`		`-module ceci_nEst_pas_une_arrow_function {`
	`44`	`+module ce_nEst_pas_une_arrow_function {`
`45`	`45`	`var a = ();`
`46`	`46`
`47`	`47`	`var b = (): void;`