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-rw-r--r--lib/fuzzer/FuzzerTracePC.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/fuzzer/FuzzerTracePC.h b/lib/fuzzer/FuzzerTracePC.h
index dc65cd720..c3f241b90 100644
--- a/lib/fuzzer/FuzzerTracePC.h
+++ b/lib/fuzzer/FuzzerTracePC.h
@@ -276,6 +276,7 @@ void TracePC::CollectFeatures(Callback HandleFeature) const {
// Step function, grows similar to 8 * Log_2(A).
auto StackDepthStepFunction = [](uint32_t A) -> uint32_t {
+ if (!A) return A;
uint32_t Log2 = Log(A);
if (Log2 < 3) return A;
Log2 -= 3;