Handle missing parameter named in isValidDeclarationForTupleLabel

weswigham · weswigham · commit e3a1cb1ec6fb · 2020-05-14T16:03:52.000-07:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -27046,7 +27046,7 @@ namespace ts {
         }
 
         function isValidDeclarationForTupleLabel(d: Declaration): d is NamedTupleMember | (ParameterDeclaration & { name: Identifier }) {
-            return d.kind === SyntaxKind.NamedTupleMember || (isParameter(d) && isIdentifier(d.name));
+            return d.kind === SyntaxKind.NamedTupleMember || (isParameter(d) && d.name && isIdentifier(d.name));
         }
 
         function getNameableDeclarationAtPosition(signature: Signature, pos: number) {

Original file line number	Diff line number	Diff line change
`@@ -27046,7 +27046,7 @@ namespace ts {`
`27046`	`27046`	`}`
`27047`	`27047`
`27048`	`27048`	`function isValidDeclarationForTupleLabel(d: Declaration): d is NamedTupleMember \| (ParameterDeclaration & { name: Identifier }) {`
`27049`		`- return d.kind === SyntaxKind.NamedTupleMember \|\| (isParameter(d) && isIdentifier(d.name));`
	`27049`	`+ return d.kind === SyntaxKind.NamedTupleMember \|\| (isParameter(d) && d.name && isIdentifier(d.name));`
`27050`	`27050`	`}`
`27051`	`27051`
`27052`	`27052`	`function getNameableDeclarationAtPosition(signature: Signature, pos: number) {`