Regression: Compiler crash on call expression with private identifier on an any typed variable in 4.2RC

[dragomirtitian]

Bug Report

🔎 Search Terms

A call expression with a private identifier coming from an any typed variable crashes the compiler

🕗 Version & Regression Information

• This is a crash
• This changed between versions 4.1 and 4.2

class A {
    #m: () => void
    method(thing: any) {
        thing.#m();
    }
};

Compiler Options

{
  "compilerOptions": {
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "strictBindCallApply": true,
    "noImplicitThis": true,
    "noImplicitReturns": true,
    "alwaysStrict": true,
    "esModuleInterop": true,
    "declaration": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "moduleResolution": 2,
    "target": "ES2017",
    "jsx": "React",
    "module": "ESNext"
  }
}

Playground Link: Provided

🙁 Actual behavior

Compiler crashes

🙂 Expected behavior

Compiler should not crash.

Regression appears to have been introduced in fix for #42166 (PR)

[dragomirtitian]

Should have a PR up shortly.

[robpalme]

Thank you for the lightning fast turnaround on this.