tests/cases/compiler/contextualTyping39.ts(1,11): error TS2352: Neither type '() => string' nor type '() => number' is assignable to the other.
  Type 'string' is not assignable to type 'number'.


==== tests/cases/compiler/contextualTyping39.ts (1 errors) ====
    var foo = <{ (): number; }> function() { return "err"; };
              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! error TS2352: Neither type '() => string' nor type '() => number' is assignable to the other.
!!! error TS2352:   Type 'string' is not assignable to type 'number'.