Missing implicit-any error on computed property in destructuring

[mattmccutchen]

TypeScript Version: current master (5e5b770)

Code

// Compile with --noImplicitAny
function getSomePropertyName() {
  return "a";
}
function foo(s: string) {}
let {[getSomePropertyName()]: x} = {a: 4, b: 5};
foo(x);

Expected behavior:
Implicit-any error on x.

Actual behavior:
x has type any and can be passed to foo without error.

[mhegazy]

seems related to #20725

[mattmccutchen]

Duplicate of #20725