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-rw-r--r--indra/llcommon/lltraceaccumulators.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/indra/llcommon/lltraceaccumulators.h b/indra/llcommon/lltraceaccumulators.h
index d4ff4b8d71..bf195f72b1 100644
--- a/indra/llcommon/lltraceaccumulators.h
+++ b/indra/llcommon/lltraceaccumulators.h
@@ -342,6 +342,7 @@ namespace LLTrace
mSum += mLastValue * delta_time;
mTotalSamplingTime += delta_time;
F64 old_mean = mMean;
+ llassert(mMean < 0 || mMean >= 0);
mMean += (delta_time / mTotalSamplingTime) * (mLastValue - old_mean);
llassert(mMean < 0 || mMean >= 0);
mSumOfSquares += delta_time * (mLastValue - old_mean) * (mLastValue - mMean);