SL-17816 Crash trying to schedule audio decoding on shutdown

indra/llaudio/llaudiodecodemgr.cpp

@@ -607,6 +607,8 @@ void LLAudioDecodeMgr::Impl::startMoreDecodes()
 
         // Kick off a decode
         mDecodes[decode_id] = LLPointer<LLVorbisDecodeState>(NULL);
+        try
+        {
             main_queue->postTo(
                 general_queue,
                 [decode_id]() // Work done on general queue
@@ -638,6 +640,14 @@ void LLAudioDecodeMgr::Impl::startMoreDecodes()
                     enqueueFinishAudio(decode_id, decode_state);
                 });
         }
+        catch (const LLThreadSafeQueueInterrupt&)
+        {
+            // Shutdown
+            // Consider making processQueue() do a cleanup instead
+            // of starting more decodes
+            LL_WARNS() << "Tried to start decoding on shutdown" << LL_ENDL;
+        }
+    }
 }
 
 LLPointer<LLVorbisDecodeState> beginDecodingAndWritingAudio(const LLUUID &decode_id)