Debugger: Check presence of current working directory explicitly

Change-Id: Iba6037907761702fa825764757dd00fce4a91082
Reviewed-by: Vadim Evard
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

share/qtcreator/debugger/lldbbridge.py

@@ -811,7 +811,10 @@ class Dumper(DumperBase):
         self.nativeMixed = int(args.get('nativemixed', 0))
         self.workingDirectory_ = args.get('workingdirectory', '')
         if self.workingDirectory_ == '':
-            self.workingDirectory_ = os.getcwd()
+            try:
+                self.workingDirectory_ = os.getcwd()
+            except: # Could have been deleted in the mean time.
+                pass
 
         self.ignoreStops = 0
         self.silentStops = 0