function Component(props) {
  const key = {};
  const tmp = (mutate(key), key);
  const context = {
    // Here, `tmp` is frozen (as it's inferred to be a primitive/string)
    [tmp]: identity([props.value]),
  };
  mutate(key);
  return [context, key];
}
Bug: copy of error.todo-object-expression-computed-key-modified-during-after-construction-sequence-expr
with the mutation hoisted to a named variable instead of being directly
inlined into the Object key.

Found differences in evaluator results
  Non-forget (expected):
  (kind: ok) [{"[object Object]":[42]},{"wat0":"joe","wat1":"joe"}]
  [{"[object Object]":[42]},{"wat0":"joe","wat1":"joe"}]
  Forget:
  (kind: ok) [{"[object Object]":[42]},{"wat0":"joe","wat1":"joe"}]
  [{"[object Object]":[42]},{"wat0":"joe","wat1":"joe","wat2":"joe"}]