error TS2345: Argument of type 'string | MemberQueryFilter' is not assignable to parameter of type 'MemberQueryFilter'

[huan]

According to microsoft/TypeScript#1805 (comment)
the following code is not valid in TypeScript:

function foo(x: number);
function foo(x: string);
function foo(x: number|string) {/***/}

var c: number|string;
foo(c); // ERROR: Argument type 'number|string' not assignable to parameter type 'string'

This is an very old issue. It's very strange that I just ran into this issue recently(this week). The same code work without any problem before(with tsc and tslint, in the past 12 months).

See https://circleci.com/gh/Chatie/wechaty/1884?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link

src/room.ts(518,40): error TS2345: Argument of type 'string | MemberQueryFilter' is not assignable to parameter of type 'MemberQueryFilter'.
  Type 'string' has no properties in common with type 'MemberQueryFilter'.