315198 2026-05-20 08:14:51 -0700 Fix WTF::Variant build with GCC 15 2026-05-21 08:42:14 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 loic.yhuel webkit-unassigned webkit-bug-importer oldest_to_newest 2212540 0 loic.yhuel 2026-05-20 08:14:51 -0700 Build is broken after https://commits.webkit.org/313528@main. 2212542 1 loic.yhuel 2026-05-20 08:32:10 -0700 Pull request: https://github.com/WebKit/WebKit/pull/65293 2212545 2 loic.yhuel 2026-05-20 08:39:03 -0700 In file included from /home/src/upstream/webkit/Source/WTF/wtf/StdLibExtras.h:52, from /home/src/upstream/webkit/Source/WTF/wtf/MallocCommon.h:29, from /home/src/upstream/webkit/Source/WTF/wtf/FastMalloc.h:28, from /home/src/upstream/webkit/Source/WTF/config.h:31, from /home/src/upstream/webkit/Source/WTF/wtf/JSONValues.cpp:33: /home/src/upstream/webkit/Source/WTF/wtf/Variant.h: In instantiation of ‘constexpr mpark::detail::base<Ts>::alt_at<I>& mpark::detail::base<Ts>::get_alt() const & [with long unsigned int I = 6; Ts = {std::monostate, bool, double, int, WTF::String, WTF::JSONImpl::Value::ObjectTypeTag, WTF::JSONImpl::Value::ArrayTypeTag}]’: /home/src/upstream/webkit/Source/WTF/wtf/Variant.h:1475:66: error: use of built-in trait ‘__type_pack_element<I, std::monostate, bool, double, int, WTF::String, WTF::JSONImpl::Value::ObjectTypeTag, WTF::JSONImpl::Value::ArrayTypeTag>’ in function signature; use library traits instead 1475 | template <std::size_t I> inline constexpr const alt_at<I> &get_alt() const & noexcept { | ^~~~~~~ /home/src/upstream/webkit/Source/WTF/wtf/Variant.h: In instantiation of ‘constexpr mpark::detail::base<Ts>::alt_at<I>& mpark::detail::base<Ts>::get_alt() const & [with long unsigned int I = 5; Ts = {std::monostate, bool, double, int, WTF::String, WTF::JSONImpl::Value::ObjectTypeTag, WTF::JSONImpl::Value::ArrayTypeTag}]’: /home/src/upstream/webkit/Source/WTF/wtf/Variant.h:1475:66: error: use of built-in trait ‘__type_pack_element<I, std::monostate, bool, double, int, WTF::String, WTF::JSONImpl::Value::ObjectTypeTag, WTF::JSONImpl::Value::ArrayTypeTag>’ in function signature; use library traits instead ... /home/src/upstream/webkit/Source/WTF/wtf/Variant.h: In instantiation of ‘constexpr mpark::detail::base<Ts>::alt_at<I>& mpark::detail::base<Ts>::get_alt() & [with long unsigned int I = 6; Ts = {std::monostate, bool, double, int, WTF::String, WTF::JSONImpl::Value::ObjectTypeTag, WTF::JSONImpl::Value::ArrayTypeTag}]’: /home/src/upstream/webkit/Source/WTF/wtf/Variant.h:1472:60: error: use of built-in trait ‘__type_pack_element<I, std::monostate, bool, double, int, WTF::String, WTF::JSONImpl::Value::ObjectTypeTag, WTF::JSONImpl::Value::ArrayTypeTag>’ in function signature; use library traits instead 1472 | template <std::size_t I> inline constexpr alt_at<I> &get_alt() & noexcept { | ^~~~~~~ ... 2212933 3 ews-feeder 2026-05-21 08:41:45 -0700 Committed 313666@main (3917eb489bf7): <https://commits.webkit.org/313666@main> Reviewed commits have been landed. Closing PR #65293 and removing active labels. 2212934 4 webkit-bug-importer 2026-05-21 08:42:14 -0700 <rdar://problem/177626501>