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-rw-r--r--src/corelib/statemachine/qstatemachine.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/corelib/statemachine/qstatemachine.cpp b/src/corelib/statemachine/qstatemachine.cpp
index a275a108e1..81be186a30 100644
--- a/src/corelib/statemachine/qstatemachine.cpp
+++ b/src/corelib/statemachine/qstatemachine.cpp
@@ -1692,6 +1692,8 @@ void QStateMachinePrivate::registerSignalTransition(QSignalTransition *transitio
if (!sender)
return;
QByteArray signal = QSignalTransitionPrivate::get(transition)->signal;
+ if (signal.isEmpty())
+ return;
if (signal.startsWith('0'+QSIGNAL_CODE))
signal.remove(0, 1);
const QMetaObject *meta = sender->metaObject();