[libcxx-commits] [libcxx] [libc++] Fix possible out of range access in bitset (PR #121348)

[Louis Dionne via libcxx-commits]

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@@ -522,12 +571,40 @@ inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void __bitset<1, _Siz
 
 template <size_t _Size>
 inline _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long __bitset<1, _Size>::to_ulong() const {
-  return __first_;
+  return __to_ulong(_BoolConstant<_Size <= sizeof(unsigned long) * CHAR_BIT>());
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ldionne wrote:

I'd make the same transformation here.

https://github.com/llvm/llvm-project/pull/121348