1 files changed, 4 insertions, 1 deletions
diff --git a/src/corelib/statemachine/qstatemachine.cpp b/src/corelib/statemachine/qstatemachine.cpp
index a257cbc306..aad88da175 100644
--- a/src/corelib/statemachine/qstatemachine.cpp
+++ b/src/corelib/statemachine/qstatemachine.cpp
@@ -3139,7 +3139,10 @@ void QSignalEventGenerator::execute(void **_a)
     if (machinePrivate->state != QStateMachinePrivate::Running)
         return;
     int signalIndex = senderSignalIndex();
-    Q_ASSERT(signalIndex != -1);
+    if (signalIndex == -1) {
+        qWarning() << "StateMachine: Could not execute transition because originating object has been deleted";
+        return;
+    }
     machinePrivate->handleTransitionSignal(sender(), signalIndex, _a);
 }