tests/cases/conformance/es6/Symbols/symbolProperty52.ts(2,13): error TS2339: Property 'nonsense' does not exist on type 'SymbolConstructor'. tests/cases/conformance/es6/Symbols/symbolProperty52.ts(5,1): error TS2322: Type '{}' is not assignable to type '{ [Symbol.nonsense]: number; }'. Property '[Symbol.nonsense]' is missing in type '{}'. tests/cases/conformance/es6/Symbols/symbolProperty52.ts(7,12): error TS2339: Property 'nonsense' does not exist on type 'SymbolConstructor'. ==== tests/cases/conformance/es6/Symbols/symbolProperty52.ts (3 errors) ==== var obj = { [Symbol.nonsense]: 0 ~~~~~~~~ !!! error TS2339: Property 'nonsense' does not exist on type 'SymbolConstructor'. }; obj = {}; ~~~ !!! error TS2322: Type '{}' is not assignable to type '{ [Symbol.nonsense]: number; }'. !!! error TS2322: Property '[Symbol.nonsense]' is missing in type '{}'. obj[Symbol.nonsense]; ~~~~~~~~ !!! error TS2339: Property 'nonsense' does not exist on type 'SymbolConstructor'.