Fix error handling in CMIDriver::DoMainLoop after r215223 (MI)

llvm-svn: 232713

lldb/tools/lldb-mi/MIDriver.cpp

@@ -529,18 +529,19 @@ CMIDriver::DoMainLoop(void)
     if (!StartWorkerThreads())
         return MIstatus::failure;
 
-    // App is not quitting currently
-    m_bExitApp = false;
-
     if (HaveExecutableFileNamePathOnCmdLine())
     {
         if (!LocalDebugSessionStartupExecuteCommands())
         {
+            StopWorkerThreads();
             SetErrorDescription(MIRSRC(IDS_MI_INIT_ERR_LOCAL_DEBUG_SESSION));
             return MIstatus::failure;
         }
     }
 
+    // App is not quitting currently
+    m_bExitApp = false;
+
     // While the app is active
     while (!m_bExitApp)
     {