1 files changed, 1 insertions, 1 deletions
diff --git a/lib/dir_lock.cpp b/lib/dir_lock.cpp
index da119f88..bbd97454 100644
--- a/lib/dir_lock.cpp
+++ b/lib/dir_lock.cpp
@@ -552,7 +552,7 @@ public:
     ~SharedDirLock()
     {
         threadObj.interrupt(); //thread lifetime is subset of this instances's life
-        threadObj.join();
+        threadObj.join(); //we assume precondition "threadObj.joinable()"!!!
 
         ::releaseLock(lockfilename_); //throw ()
     }