tree 386f691207235e360832ae234f1567d5f5240d45
parent 546cef5277d69eae0c8a6fef31fae7ce94ca8e9e
author Jason Simmons <jason-simmons@users.noreply.github.com> 1478811356 -0800
committer GitHub <noreply@github.com> 1478811356 -0800

In the semantics tree, do not detach a child if it has already been assigned a new parent (#6773)

Fixes https://github.com/flutter/flutter/issues/6690

Also add a version of the Gallery smoke test that enables semantics