fix for EXT-5683: viewer crashes at llcommon/llworkerthread.cpp(323): ERROR: LLWorkerClass::checkWork: ASSERT(workreq).

1 files changed, 24 insertions, 2 deletions

diff --git a/indra/newview/lltexturefetch.cpp b/indra/newview/lltexturefetch.cpp
index 0053ce8df8..b1b3ae473c 100644
--- a/indra/newview/lltexturefetch.cpp
+++ b/indra/newview/lltexturefetch.cpp
@@ -431,11 +431,11 @@ LLTextureFetchWorker::~LLTextureFetchWorker()
 // 			<< " Desired=" << mDesiredDiscard << llendl;
 	llassert_always(!haveWork());
 	lockWorkMutex();
-	if (mCacheReadHandle != LLTextureCache::nullHandle())
+	if (mCacheReadHandle != LLTextureCache::nullHandle() && mFetcher->mTextureCache)
 	{
 		mFetcher->mTextureCache->readComplete(mCacheReadHandle, true);
 	}
-	if (mCacheWriteHandle != LLTextureCache::nullHandle())
+	if (mCacheWriteHandle != LLTextureCache::nullHandle() && mFetcher->mTextureCache)
 	{
 		mFetcher->mTextureCache->writeComplete(mCacheWriteHandle, true);
 	}
@@ -1429,6 +1429,8 @@ LLTextureFetch::LLTextureFetch(LLTextureCache* cache, LLImageDecodeThread* image
 
 LLTextureFetch::~LLTextureFetch()
 {
+	clearDeleteList() ;
+
 	// ~LLQueuedThread() called here
 }
 
@@ -1737,6 +1739,26 @@ S32 LLTextureFetch::update(U32 max_time_ms)
 	return res;
 }
 
+//called in the MAIN thread after the TextureCacheThread shuts down.
+void LLTextureFetch::shutDownTextureCacheThread() 
+{
+	if(mTextureCache)
+	{
+		llassert_always(mTextureCache->isQuitting() || mTextureCache->isStopped()) ;
+		mTextureCache = NULL ;
+	}
+}
+	
+//called in the MAIN thread after the ImageDecodeThread shuts down.
+void LLTextureFetch::shutDownImageDecodeThread() 
+{
+	if(mImageDecodeThread)
+	{
+		llassert_always(mImageDecodeThread->isQuitting() || mImageDecodeThread->isStopped()) ;
+		mImageDecodeThread = NULL ;
+	}
+}
+
 // WORKER THREAD
 void LLTextureFetch::startThread()
 {