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-rw-r--r--indra/newview/llfasttimerview.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/indra/newview/llfasttimerview.cpp b/indra/newview/llfasttimerview.cpp
index 5b8ca6c49c..9cf9f45bfb 100644
--- a/indra/newview/llfasttimerview.cpp
+++ b/indra/newview/llfasttimerview.cpp
@@ -448,6 +448,8 @@ void saveChart(const std::string& label, const char* suffix, LLImageRaw* scratch
// disable use of glReadPixels which messes up nVidia nSight graphics debugging
if (!LLRender::sNsightDebugSupport)
{
+ LLImageDataSharedLock lock(scratch);
+
//read result back into raw image
glReadPixels(0, 0, 1024, 512, GL_RGB, GL_UNSIGNED_BYTE, scratch->getData());