314391 2026-05-08 04:31:22 -0700 REGRESSION(312858@main): Breaks the build with GCC 12 due to missing <format> header 2026-05-08 10:12:38 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 314410 P2 Normal --- 1 csaavedra webkit-unassigned ccarley2 oldest_to_newest 2208947 0 csaavedra 2026-05-08 04:31:22 -0700 We need to support GCC 12 still for some months https://docs.webkit.org/Ports/WebKitGTK%20and%20WPE%20WebKit/DependenciesPolicy.html [8/77] Building CXX object Tools/TestWebKitAPI/CMakeFiles/TestWTF.dir/Tests/WTF/FormattedLogging.cpp.o FAILED: Tools/TestWebKitAPI/CMakeFiles/TestWTF.dir/Tests/WTF/FormattedLogging.cpp.o /usr/bin/ccache /usr/bin/c++ -DBUILDING_GTK__=1 -DBUILDING_TestWTF -DBUILDING_WEBKIT=1 -DBUILDING_WITH_CMAKE=1 -DBWRAP_EXECUTABLE=\"/usr/bin/bwrap\" -DDBUS_PROXY_EXECUTABLE=\"/usr/bin/xdg-dbus-proxy\" -DGETTEXT_PACKAGE=\"WebKitGTK-6.0\" -DGTEST_CREATE_SHARED_LIBRARY=1 -DGTEST_HAS_PTHREAD=1 -DGTEST_HAS_RTTI=0 -DHAVE_CONFIG_H=1 -DJSC_GLIB_API_ENABLED -DPAS_BMALLOC=1 -DSTATICALLY_LINKED_WITH_WTF -DSTATICALLY_LINKED_WITH_bmalloc -D_GLIBCXX_ASSERTIONS=1 -I/home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/WebKitBuild/GTK/Release -I/home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/Tools/TestWebKitAPI -I/home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/Source/ThirdParty/gtest/include -I/home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/WebKitBuild/GTK/Release/WTF/Headers -I/home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/WebKitBuild/GTK/Release/bmalloc/Headers -I/home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/WebKitBuild/GTK/Release/bmalloc/PrivateHeaders -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /usr/include/libmount -isystem /usr/include/blkid -isystem /usr/include/sysprof-4 -fdiagnostics-color=always -Wextra -Wall -pipe -fmax-errors=20 -Wno-dangling-pointer -Wno-invalid-offsetof -Wno-odr -Wno-stringop-overread -Wno-stringop-overflow -Wno-nonnull -Wno-array-bounds -Wno-expansion-to-defined -Wno-noexcept-type -fno-unswitch-loops -Wno-subobject-linkage -Wno-psabi -Wno-misleading-indentation -Wno-maybe-uninitialized -Wundef -Wpointer-arith -Wmissing-format-attribute -Wformat-security -Wcast-align -Wno-tautological-compare -fasynchronous-unwind-tables -fdebug-types-section -fno-omit-frame-pointer -fno-strict-aliasing -fno-exceptions -fno-rtti -fcoroutines -ffunction-sections -fdata-sections -O3 -DNDEBUG -fPIE -fvisibility=hidden -Wno-dangling-else -Wno-sign-compare -Wno-undef -Wno-unused-parameter -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -pthread -I/usr/include/libmount -I/usr/include/blkid -std=c++23 -MD -MT Tools/TestWebKitAPI/CMakeFiles/TestWTF.dir/Tests/WTF/FormattedLogging.cpp.o -MF Tools/TestWebKitAPI/CMakeFiles/TestWTF.dir/Tests/WTF/FormattedLogging.cpp.o.d -o Tools/TestWebKitAPI/CMakeFiles/TestWTF.dir/Tests/WTF/FormattedLogging.cpp.o -c /home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/Tools/TestWebKitAPI/Tests/WTF/FormattedLogging.cpp In file included from /home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/Tools/TestWebKitAPI/Tests/WTF/FormattedLogging.cpp:27: /home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/WebKitBuild/GTK/Release/WTF/Headers/wtf/FormattedLogging.h:29:10: fatal error: format: No such file or directory 29 | #include <format> | ^~~~~~~~ compilation terminated. [9/77] cd /home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/WebKitBuild/GTK/Release/Source/WebKit && /usr/bin/perl /home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/Source/WebKit/Scripts/generate-forwarding-headers.pl --include-path /home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/Source/WebKit --output /home/buildbot/worker/GTK-Linux-64-bit-Release-Debian-12-Build/build/WebKitBuild/GTK/Release/DerivedSources/ForwardingHeaders --platform gtk --platform soup [10/77] Generating DeveloperTools/compile_commands.json [11/77] Linking CXX executable bin/TestWebKitAPI/TestWebCore ninja: build stopped: subcommand failed. program finished with exit code 1 elapsedTime=24.996124 2208949 1 csaavedra 2026-05-08 04:35:19 -0700 See https://build.webkit.org/#/builders/46/builds/64704 2209042 2 csaavedra 2026-05-08 10:12:38 -0700 *** This bug has been marked as a duplicate of bug 314410 ***