tests/cases/compiler/signatureLengthMismatchCall.ts(5,15): error TS2345: Argument of type '(a: number, b: number) => void' is not assignable to parameter of type '(a: number) => void'.
  Target signature provides too few arguments. Expected 2 or more, but got 1.


==== tests/cases/compiler/signatureLengthMismatchCall.ts (1 errors) ====
    function takesCallback(fn: (a: number) => void) {
      // ...
    }
    
    takesCallback((a: number, b: number) => {});
                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! error TS2345: Argument of type '(a: number, b: number) => void' is not assignable to parameter of type '(a: number) => void'.
!!! error TS2345:   Target signature provides too few arguments. Expected 2 or more, but got 1.
    