tests/cases/compiler/collisionSuperAndLocalVarInMethod.ts(9,13): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference. tests/cases/compiler/collisionSuperAndLocalVarInMethod.ts(15,17): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference. ==== tests/cases/compiler/collisionSuperAndLocalVarInMethod.ts (2 errors) ==== var _super = 10; // No Error class Foo { x() { var _super = 10; // No error } } class b extends Foo { public foo() { var _super = 10; // Should be error ~~~~~~ !!! error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference. } } class c extends Foo { public foo() { var x = () => { var _super = 10; // Should be error ~~~~~~ !!! error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference. } } }