Safely remove all internal clients and override-redirect windows
When we destroy all internal clients and override-redirect windows, we assume that corresponding lists will be implicitly detached. However, in some cases, that might be not the case. For example, if the list is not shared, neither begin() nor end() will detach. Therefore, it is possible to hit invalidated iterators if the list is modified inside the loop. This change prevents hitting invalidated iterators by making explicit list copies. CCBUG: 427373
parent
a5b811da