=== tests/cases/conformance/expressions/assignmentOperator/assignmentGenericLookupTypeNarrowing.ts ===
// Repro from #26130

let mappedObject: {[K in "foo"]: null | {x: string}} = {foo: {x: "hello"}};
>mappedObject : Symbol(mappedObject, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 3))
>K : Symbol(K, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 20))
>x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 41))
>foo : Symbol(foo, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 56))
>x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 62))

declare function foo<T>(x: T): null | T;
>foo : Symbol(foo, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 75))
>T : Symbol(T, Decl(assignmentGenericLookupTypeNarrowing.ts, 3, 21))
>x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 3, 24))
>T : Symbol(T, Decl(assignmentGenericLookupTypeNarrowing.ts, 3, 21))
>T : Symbol(T, Decl(assignmentGenericLookupTypeNarrowing.ts, 3, 21))

function bar<K extends "foo">(key: K) {
>bar : Symbol(bar, Decl(assignmentGenericLookupTypeNarrowing.ts, 3, 40))
>K : Symbol(K, Decl(assignmentGenericLookupTypeNarrowing.ts, 5, 13))
>key : Symbol(key, Decl(assignmentGenericLookupTypeNarrowing.ts, 5, 30))
>K : Symbol(K, Decl(assignmentGenericLookupTypeNarrowing.ts, 5, 13))

  const element = foo(mappedObject[key]);
>element : Symbol(element, Decl(assignmentGenericLookupTypeNarrowing.ts, 6, 7))
>foo : Symbol(foo, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 75))
>mappedObject : Symbol(mappedObject, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 3))
>key : Symbol(key, Decl(assignmentGenericLookupTypeNarrowing.ts, 5, 30))

  if (element == null)
>element : Symbol(element, Decl(assignmentGenericLookupTypeNarrowing.ts, 6, 7))

    return;
  const x = element.x;
>x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 9, 7))
>element.x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 41))
>element : Symbol(element, Decl(assignmentGenericLookupTypeNarrowing.ts, 6, 7))
>x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 41))
}