tests/cases/conformance/es6/Symbols/symbolType2.ts(2,7): error TS2361: The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter


==== tests/cases/conformance/es6/Symbols/symbolType2.ts (1 errors) ====
    Symbol.isConcatSpreadable in {};
    "" in Symbol.toPrimitive;
          ~~~~~~~~~~~~~~~~~~
!!! error TS2361: The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter