==== 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
        ~
!!! Type '(delimiter?: string) => ParserFunc' is not assignable to type 'ParserFunc':
!!!   Types of parameters 'delimiter' and 'eventEmitter' are incompatible:
!!!     Type 'string' is not assignable to type 'number'.
    var e: ParserFunc = parsers.readline(); // ok