tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(2,5): error TS2300: Duplicate identifier '"a b"'. tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(3,5): error TS2300: Duplicate identifier '"a b"'. tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(4,12): error TS2300: Duplicate identifier '"c d"'. tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(5,12): error TS2300: Duplicate identifier '"c d"'. tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(9,5): error TS2300: Duplicate identifier '"a b"'. tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(10,5): error TS2300: Duplicate identifier '"a b"'. tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(14,5): error TS2300: Duplicate identifier '"a b"'. tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(15,5): error TS2300: Duplicate identifier '"a b"'. tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(19,5): error TS2300: Duplicate identifier '"a b"'. tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(20,5): error TS1005: ',' expected. tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(20,5): error TS2300: Duplicate identifier '"a b"'. ==== tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts (11 errors) ==== class C { "a b": number; ~~~~~ !!! error TS2300: Duplicate identifier '"a b"'. "a b": number; ~~~~~ !!! error TS2300: Duplicate identifier '"a b"'. static "c d": number; ~~~~~ !!! error TS2300: Duplicate identifier '"c d"'. static "c d": number; ~~~~~ !!! error TS2300: Duplicate identifier '"c d"'. } interface I { "a b": number; ~~~~~ !!! error TS2300: Duplicate identifier '"a b"'. "a b": number; ~~~~~ !!! error TS2300: Duplicate identifier '"a b"'. } var a: { "a b": number; ~~~~~ !!! error TS2300: Duplicate identifier '"a b"'. "a b": number; ~~~~~ !!! error TS2300: Duplicate identifier '"a b"'. } var b = { "a b": 1 ~~~~~ !!! error TS2300: Duplicate identifier '"a b"'. "a b": 1 ~~~~~ !!! error TS1005: ',' expected. ~~~~~ !!! error TS2300: Duplicate identifier '"a b"'. }