Avoid UB in debug code

`std::memset` calls with a nullptr argument are flagged as UB by GCC `-fsanitize=undefined`, so check the size first Fixes boostorg#39
Flamefire · Sep 17, 2024 · 598d346 · 598d346
1 parent 05a8322
commit 598d346
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/include/boost/circular_buffer/debug.hpp b/include/boost/circular_buffer/debug.hpp
@@ -34,7 +34,8 @@ const int UNINITIALIZED = 0xcc;
 
 template <class T>
 inline void do_fill_uninitialized_memory(T* data, std::size_t size_in_bytes) BOOST_NOEXCEPT {
-    std::memset(static_cast<void*>(data), UNINITIALIZED, size_in_bytes);
+    if(size_in_bytes)
+        std::memset(static_cast<void*>(data), UNINITIALIZED, size_in_bytes);
 }
 
 template <class T>