Handle missing parameter named in isValidDeclarationForTupleLabel

microsoft · May 14, 2020 · e3a1cb1 · e3a1cb1
1 parent a7aa566
commit e3a1cb1
Showing 1 changed file with 1 addition and 1 deletion.
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) {