946f39b477
This reverts commit 60113056bc4c328f62808d1c0fa2a1abec481f78. Calling
d->cond.notify_all();
without the mutex means that another thread could acquire the semaphore
(acquire the mutex, subtract from d->avail, return to caller) and
destroy it. That would mean this thread is now effectively dereferencing
a dangling d pointer.
Fixes: QTBUG-120762
Pick-to: 6.6 6.5
Change-Id: I196523f9addf41c2bf1ffffd17a96317f88b43dd
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>
(cherry picked from commit 763ab0e6236de80a0b589fc574c75a414d86d374)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>