snapshots seg: clz UBSAN fix (#1795)

erigontech · Feb 1, 2024 · f0edd23 · f0edd23
1 parent 2ecfc88
commit f0edd23
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/silkworm/node/snapshots/seg/compressor/patricia_tree.cpp b/silkworm/node/snapshots/seg/compressor/patricia_tree.cpp
@@ -81,6 +81,7 @@ struct State {
 
 //! Count leading zero bits.
 static inline uint32_t clz32(uint32_t x) {
+    if (x == 0) return 32;
     return static_cast<uint32_t>(__builtin_clz(x));
 }