Check if workThread exists before trying to access it.

This can only happen if workThread wasn't created and you're trying to
get a Database from a wrong thread.

diff --git a/localmylist/mylist.cpp b/localmylist/mylist.cpp
index 39cfc705053e3b0b9997e51dcd75e7a20b018c62..a1f616d839f361fa5b5c63796dd8c007b471497c 100644 (file)
--- a/localmylist/mylist.cpp
+++ b/localmylist/mylist.cpp
@@ -88,8 +88,14 @@ Database *MyList::database() const
        if (QThread::currentThread() == thread())
                return db;
        // QThread is in the thread that created it.
-       if (QThread::currentThread() == workThread->database()->thread())
+       if (workThread && QThread::currentThread() == workThread->database()->thread())
                return workThread->database();
+
+       qWarning("Tried to get a database from a different thread. Qt database "
+                        "plugins are not thread-safe. This extends to the LML Database. "
+                        "You can only use a Database from the thread in which MyList was "
+                        "created.");
+
        return 0;
 }