a338e222cc
It's a shared list that, in theory, can be written to by multiple threads. Protect it with a mutex. To make the change in a clean way, move all the .contains() checks into a separate function so we can simply hold the lock in there. Pick-to: 6.6 6.5 Change-Id: I99ff185346d52e43a3f59f2910a7b2fa6031e3e4 Reviewed-by: Edward Welbourne <edward.welbourne@qt.io> (cherry picked from commit c60db318836cf22b0f00b78ea189ba33fcf7b1c7) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>