==== tests/cases/compiler/functionSignatureAssignmentCompat1.ts (1 errors) ====
    interface ParserFunc {
        (eventEmitter: number, buffer: string): void;
    }
    interface Parsers {
        raw: ParserFunc;
        readline(delimiter?: string): ParserFunc;
    }
    var parsers: Parsers;
    var c: ParserFunc = parsers.raw; // ok!
    var d: ParserFunc = parsers.readline; // not ok
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! functionSignatureAssignmentCompat1.ts(10,5): error TS2012: Cannot convert '(delimiter?: string) => ParserFunc' to 'ParserFunc':
!!! 	Call signatures of types '(delimiter?: string) => ParserFunc' and 'ParserFunc' are incompatible.
    var e: ParserFunc = parsers.readline(); // ok