Maybe I'm just overlooking it in the build log, but there doesn't appear to be an error message and yet firefox consistently fails to build with dev-lang/rust-1.67.1.
Created attachment 857347 [details] Build log
Created attachment 857349 [details] emerge --info
I rebooted for a new kernel and now firefox builds just fine...
4:49.89 modules/libpref/Unified_cpp_modules_libpref0.o 4:49.89 /usr/lib/ccache/bin/x86_64-pc-linux-gnu-clang++ -Qunused-arguments -std=gnu++17 -o Unified_cpp_modules_libpref0.o -c -I/var/tmp/portage/www-client/firefox-110.0.1/work/firefox_build/dist/stl_wrappers -I/var/tmp/portage/www-client/firefox-110.0.1/work/firefox_build/dist/system_wrappers -include /var/tmp/portage/www-client/firefox-110.0.1/work/firefox-110.0.1/config/gcc_hidden.h -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fstack-protector-strong -fstack-clash-protection -DNDEBUG=1 -DTRIMMED=1 -DOS_POSIX=1 -DOS_LINUX=1 -DOS_ARCH=Linux -DMOZ_WIDGET_TOOLKIT=gtk -DMOZ_SERVICES_SYNC -DMOZ_BUILD_APP_IS_BROWSER -DMOZ_HAS_MOZGLUE -DMOZILLA_INTERNAL_API -DIMPL_LIBXUL -DSTATIC_EXPORTABLE_JS_API -I/var/tmp/portage/www-client/firefox-110.0.1/work/firefox-110.0.1/modules/libpref -I/var/tmp/portage/www-client/firefox-110.0.1/work/firefox_build/modules/libpref -I/var/tmp/portage/www-client/firefox-110.0.1/work/firefox_build/ipc/ipdl/_ipdlheaders -I/var/tmp/portage/www-client/firefox-110.0.1/work/firefox-110.0.1/ipc/chromium/src -I/var/tmp/portage/www-client/firefox-110.0.1/work/firefox_build/dist/include -I/usr/include/nspr -I/usr/include/nss -I/usr/include/nspr -I/var/tmp/portage/www-client/firefox-110.0.1/work/firefox_build/dist/include/nss -I/usr/include/libpng16 -I/usr/include/pixman-1 -DMOZILLA_CLIENT -include /var/tmp/portage/www-client/firefox-110.0.1/work/firefox_build/mozilla-config.h -fno-sized-deallocation -fno-aligned-new -pipe -fno-exceptions -fPIC -fno-rtti -ffunction-sections -fdata-sections -fno-exceptions -fno-math-errno -pthread -pipe -O2 -fomit-frame-pointer -funwind-tables -Wall -Wbitfield-enum-conversion -Wdeprecated-this-capture -Wempty-body -Wformat-type-confusion -Wignored-qualifiers -Wpointer-arith -Wshadow-field-in-constructor-modified -Wsign-compare -Wtype-limits -Wno-error=tautological-type-limit-compare -Wunreachable-code -Wunreachable-code-return -Wunused-but-set-parameter -Wno-invalid-offsetof -Wclass-varargs -Wempty-init-stmt -Wfloat-overflow-conversion -Wfloat-zero-conversion -Wloop-analysis -Wno-range-loop-analysis -Wc++2a-compat -Wenum-compare-conditional -Wenum-float-conversion -Wno-ambiguous-reversed-operator -Wno-error=deprecated -Wno-error=deprecated-anon-enum-enum-conversion -Wno-error=deprecated-enum-enum-conversion -Wno-error=deprecated-pragma -Wno-error=deprecated-this-capture -Wcomma -Wimplicit-fallthrough -Wstring-conversion -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wformat -Wformat-security -Wno-psabi -Wthread-safety -Wno-unknown-warning-option -fno-strict-aliasing -ffp-contract=off -MD -MP -MF .deps/Unified_cpp_modules_libpref0.o.pp -fcolor-diagnostics Unified_cpp_modules_libpref0.cpp 5:20.46 make[4]: *** [/var/tmp/portage/www-client/firefox-110.0.1/work/firefox-110.0.1/config/rules.mk:675: Unified_cpp_modules_libpref0.o] Error 255 5:20.47 make[4]: Leaving directory '/var/tmp/portage/www-client/firefox-110.0.1/work/firefox_build/modules/libpref' 5:20.47 make[3]: *** [/var/tmp/portage/www-client/firefox-110.0.1/work/firefox-110.0.1/config/recurse.mk:72: modules/libpref/target-objects] Error 2 bizarre!
This was on my glibc system and I was later able to reproduce it on my musl system too. That time I restarted my X session resolving my stale PIDs for mesa which seems to have fixed the issue for firefox...
