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-rw-r--r--src/corelib/kernel/qobject.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index 7fe9c52..c3102ea 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -408,6 +408,8 @@ void QMetaObject::removeGuard(QObject **ptr)
if (!hash || hash->isEmpty())
return;
QMutexLocker locker(guardHashLock());
+ if (!*ptr) //check again, under the lock
+ return;
GuardHash::iterator it = hash->find(*ptr);
const GuardHash::iterator end = hash->end();
bool more = false; //if the QObject has more pointer attached to it.