305836 2026-01-20 07:35:54 -0800 [GCC] Build failure with GCC 12.2.0 or lower after 305289@main 2026-01-21 02:58:25 -0800 1 1 1 Unclassified WebKit WPE WebKit WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 clopez clopez angelos bugs-noreply oldest_to_newest 2173317 0 clopez 2026-01-20 07:35:54 -0800 The build is failing on the WPE/GTK Debian stable bots after 305289@main: In file included from ../../../Source/JavaScriptCore/lol/LOLJIT.cpp:27, from JavaScriptCore/DerivedSources/unified-sources/UnifiedSource-40392603-1.cpp:1: ../../../Source/JavaScriptCore/lol/LOLJIT.h: In instantiation of ‘void JSC::LOL::LOLJIT::emitWriteBarrier(const auto:303&, const auto:304&, JSC::JSValueRegs, JSC::JSValueRegs, JSC::GPRReg, JSC::JIT::WriteBarrierMode) [with auto:303 = JSC::LOL::RegisterAllocator<JSC::LOL::LOLJIT>; auto:304 = JSC::LOL::AllocationBindings<2, 0, 1>; JSC::GPRReg = JSC::ARM64Registers::RegisterID]’: ../../../Source/JavaScriptCore/lol/LOLJIT.cpp:1917:29: required from here ../../../Source/JavaScriptCore/lol/LOLJIT.h:313:18: internal compiler error: in tsubst_copy, at cp/pt.cc:17004 313 | if (mode == ShouldFilterBase || mode == ShouldFilterBaseAndValue) | ~~~~~^~~~~~~~~~~~~~~~~~~ 0x18e9577 internal_error(char const*, ...) ???:0 0x6a6c8f fancy_abort(char const*, int, char const*) ???:0 0x818a53 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ???:0 0x81a94f tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ???:0 0x81a92f tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ???:0 0x82959f instantiate_decl(tree_node*, bool, bool) ???:0 0x83da9f instantiate_pending_templates(int) ???:0 0x73cfef c_parse_final_cleanups() ???:0 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <file:///usr/share/doc/gcc-12/README.Bugs> for instructions. See: https://build.webkit.org/#/builders/859/builds/26621 However it passes on the Ubuntu 22.04 bots (those have GCC 12.3.0) and as well as on the other bots with GCC 13 or newer. 2173321 1 clopez 2026-01-20 07:47:47 -0800 Pull request: https://github.com/WebKit/WebKit/pull/56899 2173614 2 ews-feeder 2026-01-21 02:58:22 -0800 Committed 305931@main (d82b68d06902): <https://commits.webkit.org/305931@main> Reviewed commits have been landed. Closing PR #56899 and removing active labels.