QThreadStorage: fix crash if thread local destructor reset himself

Regression in ed8f3b6c98f1b305f0d183bc70c5f810a9c45ef2 (QTBUG-14579)

WebKit ThreadSpecific implementation does that.
See the comment in ThreadSpecific<T>::destroy(void*)

Reveiwed-by: Brad

1 files changed, 5 insertions, 0 deletions

diff --git a/src/corelib/thread/qthreadstorage.cpp b/src/corelib/thread/qthreadstorage.cpp
index 07d940f..416fcfb 100644
--- a/src/corelib/thread/qthreadstorage.cpp
+++ b/src/corelib/thread/qthreadstorage.cpp
@@ -201,6 +201,11 @@ void QThreadStorageData::finish(void **p)
             continue;
         }
         destructor(q); //crash here might mean the thread exited after qthreadstorage was destroyed
+
+        if (tls->size() > i) {
+            //re reset the tls in case it has been recreated by its own destructor.
+            (*tls)[i] = 0;
+        }
     }
     tls->clear();
 }