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QInternal::unregisterCallback: don't crash on unregistering during exit

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Task-number: QTBUG-60558
Change-Id: Ica9894dc9b5e48278fd4fffd14bb34c6d98d2555
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
This commit is contained in:
Thiago Macieira 2017-05-03 14:08:50 -07:00
parent fb89364e3a
commit f45c6c1804
1 changed files with 4 additions and 2 deletions
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6
src/corelib/global/qglobal.cpp
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@ -3988,8 +3988,10 @@ bool QInternal::registerCallback(Callback cb, qInternalCallback callback)
bool QInternal::unregisterCallback(Callback cb, qInternalCallback callback)
{
if (cb >= 0 && cb < QInternal::LastCallback) {
QInternal_CallBackTable *cbt = global_callback_table();
return (bool) cbt->callbacks[cb].removeAll(callback);
if (global_callback_table.exists()) {
QInternal_CallBackTable *cbt = global_callback_table();
return (bool) cbt->callbacks[cb].removeAll(callback);
}
}
return false;
}