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From: Jonathan Wakely <redi@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r13-1749] libstdc++: Make __from_chars_alnum_to_val conversion explicit Date: Tue, 19 Jul 2022 13:56:54 +0000 (GMT) [thread overview] Message-ID: <20220719135654.869A2385085D@sourceware.org> (raw) https://gcc.gnu.org/g:20ab3972240aff596a3fa98e9fb09ddc0658fbb3 commit r13-1749-g20ab3972240aff596a3fa98e9fb09ddc0658fbb3 Author: Marco Falke <falke.marco@gmail.com> Date: Tue Jul 19 10:10:39 2022 +0100 libstdc++: Make __from_chars_alnum_to_val conversion explicit The optimizations from commit r12-8175-ga54137c88061c7 introduced a clang integer sanitizer error. Fix this with an explicit static_cast, similar to the fix for PR 96766. libstdc++-v3/ChangeLog: * include/std/charconv (__from_chars_alnum_to_val): Replace implicit conversion from int to unsigned char with explicit cast. Diff: --- libstdc++-v3/include/std/charconv | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libstdc++-v3/include/std/charconv b/libstdc++-v3/include/std/charconv index 218813e4797..533320ea085 100644 --- a/libstdc++-v3/include/std/charconv +++ b/libstdc++-v3/include/std/charconv @@ -436,7 +436,7 @@ namespace __detail __from_chars_alnum_to_val(unsigned char __c) { if _GLIBCXX17_CONSTEXPR (_DecOnly) - return __c - '0'; + return static_cast<unsigned char>(__c - '0'); else { // This initializer is deliberately made dependent in order to work
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