TypeScript/tests/cases/compiler/varArgParamTypeCheck.ts

function sequence(...sequences:{():void;}[]) {
}

function callback(clb:()=>void) {
}

sequence(
    function bar() {
    },
    function foo() {
        callback(()=>{
            this();
        });
    },
    function baz() {
        callback(()=>{
            this();
        });
    }
);