I don't know why this has only just started, but filing it so I can tag a commit with it. ``` /usr/x86_64-pc-linux-gnu/gcc-bin/15/gdc -c -O3 -march=native -mtls-dialect=gnu2 -fno-semantic-interposition -pipe -fcf-protection=none -fdiagnostics-color=always -fdiagnostics-urls=neve r -fdiagnostics-explain-harder -Wa,-O2 -Wa,-mtune=znver2 -Warray-bounds=2 -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr -Wstrict-a liasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr -Wbuiltin-declaration-mismatch -ggdb3 -fversion=IN_GCC -fPIE -fno-exceptions -fasynchronous- unwind-tables -Wall -Wdeprecated -o d/aliasthis.o -MT d/aliasthis.o -MMD -MP -MF d/.deps/aliasthis.TPo -I/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d -J/var/tmp/por tage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd -J/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd/res /var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd/aliasthis.d /usr/lib/gcc/x86_64-pc-linux-gnu/15/include/d/core/lifetime.d: In function ‘_d_newclassT’: /usr/lib/gcc/x86_64-pc-linux-gnu/15/include/d/core/lifetime.d:2729:3: error: size of array element is not a multiple of its alignment 2729 | T _d_newclassT(T)() @trusted | ^ make[3]: *** [/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/Make-lang.in:412: d/aliasthis.o] Error 1 make[3]: Leaving directory '/var/tmp/portage/sys-devel/gcc-15.0.9999/work/build/gcc' make[3]: *** Waiting for unfinished jobs.... make[3]: Entering directory '/var/tmp/portage/sys-devel/gcc-15.0.9999/work/build/gcc' /usr/x86_64-pc-linux-gnu/gcc-bin/15/gdc -c -O3 -march=native -mtls-dialect=gnu2 -fno-semantic-interposition -pipe -fcf-protection=none -fdiagnostics-color=always -fdiagnostics-urls=never -fdiagnostics-explain-harder -Wa,-O2 -Wa,-mtune=znver2 -Warray-bounds=2 -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr -Wstrict-a liasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr -Wbuiltin-declaration-mismatch -ggdb3 -fversion=IN_GCC -fPIE -fno-exceptions -fasynchronous-unwind-tables -Wall -Wdeprecated -o d/aggregate.o -MT d/aggregate.o -MMD -MP -MF d/.deps/aggregate.TPo -I/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d -J/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd -J/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd/res /var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd/aggregate.d /usr/lib/gcc/x86_64-pc-linux-gnu/15/include/d/core/lifetime.d: In function ‘_d_newclassT’: /usr/lib/gcc/x86_64-pc-linux-gnu/15/include/d/core/lifetime.d:2729:3: error: size of array element is not a multiple of its alignment 2729 | T _d_newclassT(T)() @trusted | ^ make[3]: *** [/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/Make-lang.in:412: d/aggregate.o] Error 1 ``` ---- $ emerge --info Portage 3.0.66.1-3+g123a7be53-dirty (python 3.13.0-candidate-3, default/linux/amd64/23.0/hardened, gcc-15, glibc-2.40-r4, 6.10.12 x86_64) ================================================================= System uname: Linux-6.10.12-x86_64-AMD_Ryzen_9_3950X_16-Core_Processor-with-glibc2.40 KiB Mem: 65739256 total, 7780312 free KiB Swap: 16662520 total, 15591928 free Timestamp of repository gentoo: Fri, 04 Oct 2024 09:18:26 +0000 Head commit of repository gentoo: 13ffb6a5fbe7c15212401c55893a7bac6c069f2f Timestamp of repository kde: Fri, 04 Oct 2024 09:03:58 +0000 Head commit of repository kde: fb4dbfbef76463d24d33e12f0da0fd5070f9760d Timestamp of repository qt: Sun, 08 Sep 2024 18:36:41 +0000 Head commit of repository qt: 11a7cd8e7447586b6106f02bf6f9ac4934f9375c Timestamp of repository sam_c: Wed, 25 Sep 2024 11:19:20 +0000 Head commit of repository sam_c: 41dc777c0f0dad79e0bf3b042b19394083693369 sh dash 0.5.12 ld GNU ld (Gentoo 9999 p1) 2.43.50.20241003 ccache version 4.10.2 [disabled] app-misc/pax-utils: 1.3.8::gentoo app-shells/bash: 5.3_alpha_p20240927::gentoo dev-build/autoconf: 2.13-r8::gentoo, 2.69-r9::gentoo, 2.72-r1::gentoo, 9999::gentoo dev-build/automake: 1.17-r1::gentoo dev-build/cmake: 3.30.4::gentoo dev-build/libtool: 2.5.3::gentoo dev-build/make: 4.4.1-r100::gentoo dev-build/meson: 1.5.2::gentoo dev-java/java-config: 2.3.4::gentoo dev-lang/perl: 5.40.0::gentoo dev-lang/python: 3.10.15_p1::gentoo, 3.11.10_p1::gentoo, 3.12.7_p1::gentoo, 3.13.0_rc3::gentoo dev-lang/rust-bin: 1.81.0::gentoo dev-util/ccache: 4.10.2::gentoo sys-apps/baselayout: 2.15::gentoo sys-apps/sandbox: 2.39::gentoo sys-apps/systemd: 256.6::gentoo sys-devel/binutils: 2.38-r2::gentoo, 2.39-r5::gentoo, 2.40-r9::gentoo, 2.41-r5::gentoo, 2.42-r2::gentoo, 2.43.9999::gentoo, 9999::gentoo sys-devel/binutils-config: 5.5.2::gentoo sys-devel/clang: 17.0.6::gentoo, 18.1.8::gentoo, 19.1.1::gentoo sys-devel/gcc: 10.5.0::gentoo, 11.5.0::gentoo, 12.4.1_p20241003::gentoo, 13.3.1_p20240927::gentoo, 14.2.1_p20240928::gentoo, 15.0.9999::gentoo sys-devel/gcc-config: 2.11::gentoo sys-devel/lld: 18.1.8::gentoo, 19.1.1::gentoo sys-devel/llvm: 17.0.6-r3::gentoo, 18.1.8-r4::gentoo, 19.1.1::gentoo sys-kernel/linux-headers: 6.10::gentoo (virtual/os-headers) sys-libs/glibc: 2.40-r4::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: git sync-uri: https://github.com/gentoo-mirror/gentoo.git priority: -1000 eclass-overrides: sam_c volatile: False sync-git-verify-commit-signature: yes sync-git-clone-extra-opts: -b stable -c gc.reflogExpire=0 -c gc.reflogExpireUnreachable=0 -c gc.rerereresolved=0 -c gc.rerereunresolved=0 -c gc.pruneExpire=now crossdev location: /var/db/repos/crossdev masters: gentoo eclass-overrides: sam_c volatile: False kde location: /var/db/repos/kde sync-type: git sync-uri: https://github.com/gentoo-mirror/kde.git masters: gentoo eclass-overrides: sam_c volatile: False local location: /var/db/repos/local masters: gentoo eclass-overrides: sam_c volatile: False qt location: /var/db/repos/qt sync-type: git sync-uri: https://github.com/gentoo-mirror/qt.git masters: gentoo eclass-overrides: sam_c volatile: False sam_c location: /var/db/repos/sam_c sync-type: git sync-uri: https://github.com/gentoo-mirror/sam_c.git masters: gentoo eclass-overrides: sam_c volatile: False Installed sets: @sam-emacs, @sam-fonts, @sam-fortune ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="@FREE" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O3 -march=native -mtls-dialect=gnu2 -flto=jobserver -fno-semantic-interposition -pipe -fcf-protection=none -fdiagnostics-color=always -fdiagnostics-urls=never -frecord-gcc-switches -fdiagnostics-explain-harder -Wa,-O2 -Wa,-mtune=znver2 -Warray-bounds=2 -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr -Wbuiltin-declaration-mismatch" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /var/bind" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-O3 -march=native -mtls-dialect=gnu2 -flto=jobserver -fno-semantic-interposition -pipe -fcf-protection=none -fdiagnostics-color=always -fdiagnostics-urls=never -frecord-gcc-switches -fdiagnostics-explain-harder -Wa,-O2 -Wa,-mtune=znver2 -Warray-bounds=2 -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr" DISTDIR="/var/cache/distfiles" EMERGE_DEFAULT_OPTS="--keep-going --with-bdeps=y --complete-graph --deep --dynamic-deps=n --changed-deps=n --usepkg=y --implicit-system-deps=n --usepkg-exclude sys-fs/zfs --usepkg-exclude sys-fs/zfs-kmod --jobs=4 --load-average 32" ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GDK_PIXBUF_MODULE_FILE GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME" FCFLAGS="-O3 -march=native -mtls-dialect=gnu2 -flto=jobserver -fno-semantic-interposition -pipe -fcf-protection=none -fdiagnostics-color=always -fdiagnostics-urls=never -frecord-gcc-switches -fdiagnostics-explain-harder -Wa,-O2 -Wa,-mtune=znver2 -Warray-bounds=2 -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs binpkg-multi-instance buildpkg clean-logs config-protect-if-modified distlocks fixlafiles ipc-sandbox merge-wait mount-sandbox multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms split-log strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O3 -march=native -mtls-dialect=gnu2 -flto=jobserver -fno-semantic-interposition -pipe -fcf-protection=none -fdiagnostics-color=always -fdiagnostics-urls=never -frecord-gcc-switches -fdiagnostics-explain-harder -Wa,-O2 -Wa,-mtune=znver2 -Warray-bounds=2 -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr" GENTOO_MIRRORS="https://www.mirrorservice.org/sites/distfiles.gentoo.org/ https://mirror.bytemark.co.uk/gentoo/ https://mirrors.soeasyto.com/distfiles.gentoo.org/" LANG="en_GB.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs -flto=jobserver -fuse-ld=mold -Wl,--defsym=__gentoo_check_ldflags__=0" LEX="reflex" LINGUAS="en en_GB" MAKEOPTS="-j32 -l32" PKGDIR="/var/cache/binpkgs" PORTAGE_BUNZIP2_COMMAND="lbunzip2" PORTAGE_COMPRESS="xz" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" RUSTFLAGS="-C target-cpu=native -C link-arg=-Wl,-z,pack-relative-relocs" SHELL="/bin/bash" USE="X a52 aac acl acpi activities aes alsa amd64 avx avx2 bash-completion bluetooth branding bzip2 cairo caps cdda cdr clang crypt dbus declarative dist-kernel dri dts dvd dvdr editorconfig emacs encode exif f16c filecaps firewalld flac fma3 freetype gdbm gif gmp gpm graphite gtk gui hardened harfbuzz hunspell iconv icu ipv6 jit jpeg kde kdesu kf6compat kwallet lcms libnotify libtirpc lto mad mmx mmxext mng modules-compress mp3 mp4 mpeg multilib ncurses nftables nls ogg opengl openmp pam pango pclmul pcre pdf pgo pic pie pipewire plasma png policykit popcnt ppds pulseaudio qml qt5 qt6 rdrand readline screencast sdl seccomp semantic-desktop sha sound spell sse sse2 sse3 sse4_1 sse4_2 sse4a ssl ssp ssse3 startup-notification svg system-av1 system-binutils system-boost system-bootstrap system-cairo system-clang system-digest system-ffmpeg system-harfbuzz system-heimdal system-icu system-jpeg system-leveldb system-libevent system-libs system-libvpx system-libyaml system-llvm system-lz4 system-mitkrb5 system-sqlite system-ssl system-tbb system-uulib system-webp system-zlib systemd test-rust tiff truetype udev udisks unicode upower usb valgrind verify-sig vorbis vulkan wayland widgets x264 xattr xcb xft xml xtpax xv xvid zlib zsh-completion" ABI_X86="32 64" ADA_TARGET="gcc_12" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_anon authn_dbm authn_file authz_dbm authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir env expires ext_filter file_cache filter headers include info log_config logio mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt rdrand sha sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 ntrip navcom oceanserver oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 tsip tripmate tnt ublox" GUILE_SINGLE_TARGET="3-0" GUILE_TARGETS="3-0" INPUT_DEVICES="libinput" KERNEL="linux" L10N="en en-GB" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LLVM_TARGETS="AArch64 AMDGPU ARM AVR BPF Hexagon Lanai MSP430 Mips NVPTX PowerPC RISCV Sparc SystemZ WebAssembly X86 XCore" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-2" POSTGRES_TARGETS="postgres16" PYTHON_SINGLE_TARGET="python3_12" PYTHON_TARGETS="python3_12 pypy3 python3_10 python3_11 python3_13" QEMU_SOFTMMU_TARGETS="i386 x86_64" QEMU_USER_TARGETS="aarch64 aarch64_be alpha armeb hppa i386 m68k ppc ppc64 ppc64le sparc sparc64 x86_64" RUBY_TARGETS="ruby31 ruby32" VIDEO_CARDS="amdgpu radeonsi radeon" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipp2p iface geoip fuzzy condition tarpit sysrq proto logmark ipmark dhcpmac delude chaos account" YACC="byacc" Unset: ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LC_ALL, LD, LFLAGS, LIBTOOL, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PYTHONPATH, RANLIB, READELF, SIZE, STRINGS, STRIP, YFLAGS
Created attachment 904900 [details] build.log.xz
-O1 works: $ /usr/x86_64-pc-linux-gnu/gcc-bin/15/gdc -c -O3 -march=native -mtls-dialect=gnu2 -fno-semantic-interposition -pipe -fcf-protection=none -fdiagnostics-color=always -fdiagnostics-urls=never -fdiagnostics-explain-harder -Wa,-O2 -Wa,-mtune=znver2 -Warray-bounds=2 -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr -Wbuiltin-declaration-mismatch -ggdb3 -fversion=IN_GCC -fPIE -fno-exceptions -fasynchronous-unwind-tables -Wall -Wdeprecated -o d/aggregate.o -MT d/aggregate.o -MMD -MP -MF d/.deps/aggregate.TPo -I/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d -J/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd -J/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd/res /var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd/aggregate.d -O1 >=O2 doesn't: $ /usr/x86_64-pc-linux-gnu/gcc-bin/15/gdc -c -O3 -march=native -mtls-dialect=gnu2 -fno-semantic-interposition -pipe -fcf-protection=none -fdiagnostics-color=always -fdiagnostics-urls=never -fdiagnostics-explain-harder -Wa,-O2 -Wa,-mtune=znver2 -Warray-bounds=2 -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr -Wstrict-aliasing -Wfree-nonheap-object -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr -Wbuiltin-declaration-mismatch -ggdb3 -fversion=IN_GCC -fPIE -fno-exceptions -fasynchronous-unwind-tables -Wall -Wdeprecated -o d/aggregate.o -MT d/aggregate.o -MMD -MP -MF d/.deps/aggregate.TPo -I/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d -J/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd -J/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd/res /var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/d/dmd/aggregate.d -O2 /usr/lib/gcc/x86_64-pc-linux-gnu/15/include/d/core/lifetime.d: In function ‘_d_newclassT’: /usr/lib/gcc/x86_64-pc-linux-gnu/15/include/d/core/lifetime.d:2729:3: error: size of array element is not a multiple of its alignment 2729 | T _d_newclassT(T)() @trusted | ^
Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/15/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/configure --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/15 --includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/15/include --datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15 --mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15/man --infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15/info --with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15 --disable-silent-rules --disable-dependency-tracking --with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/15/python --enable-objc-gc --enable-languages=c,c++,d,go,objc,obj-c++,fortran,ada,m2,rust --enable-obsolete --enable-secureplt --disable-werror --with-system-zlib --enable-nls --without-included-gettext --disable-libunwind-exceptions --enable-checking=yes,extra,rtl --with-bugurl=https://bugs.gentoo.org/ --with-pkgversion='Gentoo Hardened 15.0.9999 p, commit 4dffefc137f5ba6524cdb6eb598313646c5df6c8' --with-gcc-major-version-only --enable-libstdcxx-time --enable-lto --disable-libstdcxx-pch --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --enable-multilib --with-multilib-list=m32,m64 --disable-fixed-point --enable-targets=all --enable-libgomp --disable-libssp --enable-libada --disable-cet --disable-systemtap --enable-valgrind-annotations --disable-vtable-verify --disable-libvtv --with-zstd --with-isl --disable-isl-version-check --enable-default-pie --enable-host-pie --enable-host-bind-now --enable-default-ssp --disable-fixincludes --with-build-config='bootstrap-O3 bootstrap-lto' Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 15.0.0 20241002 (experimental) 60f1feded2ddaf1ece86d631790641578ff0d9ae (Gentoo Hardened 15.0.9999 p, commit 4dffefc137f5ba6524cdb6eb598313646c5df6c8)
Anyway, I'm just going to use basic flags for stage1.
In theory we could wrap GDC in toolchain.eclass and check env vars (ew).
Uh, wait, no, it's with -Warray-bounds=2 (!) with >= -O2.
Reduced to: ------- $ cat repro.d class Foo { ubyte[4] not_multiple_of_8; } void foo () { new Foo(); } ------- Compile with: ------- $ gdc -o /dev/null -c repro.d -O2 -Warray-bounds=1 /usr/lib/gcc/x86_64-pc-linux-gnu/13/include/d/core/lifetime.d: In function ‘_d_newclassT’: /usr/lib/gcc/x86_64-pc-linux-gnu/13/include/d/core/lifetime.d:2725:3: error: size of array element is not a multiple of its alignment 2725 | T _d_newclassT(T)() @trusted | ^ ------- Fails for me with gcc-13 and gcc-14 but not gcc-11 or gcc-12.
It's complaining about something in druntime so I'll try to reduce the code from it too.
Without druntime: ----- $ cat repro.d module object; extern(C++) class Foo { ubyte[4] not_multiple_of_8; } extern(C) int main () { // avoid optimizations void* p = cast(void*)(0xdeadbeef); auto init = __traits(initSymbol, Foo); p[0 .. init.length] = init[]; return 0; } ----- And with some printing: ----- $ cat print.d module object; alias noreturn = typeof(*null); alias size_t = ulong; alias ptrdiff_t = long; alias string = immutable(char)[]; import core.stdc.stdio; extern(C++) class Foo { ubyte[4] not_multiple_of_8; } extern(C) int main () { // avoid optimizations void* p = cast(void*)(0xdeadbeef); auto init = __traits(initSymbol, Foo); printf("%lu\n", init.length); printf("%lu\n", init.alignof); printf("%lu\n", init[0].alignof); //p[0 .. init.length] = init[]; return 0; } ----- I get the results: --- $ gdc -o print -O2 -Warray-bounds print.d && ./print && gdc --version 12 8 1 gdc (Gentoo 13.3.1_p20240614 p17) 13.3.1 20240614 Copyright (C) 2023 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ ldc2 -betterC print.d && ./print && ldc2 --version 12 8 1 LDC - the LLVM D compiler (1.39.0): based on DMD v2.109.1 and LLVM 18.1.8 built with LDC - the LLVM D compiler (1.39.0) Default target: x86_64-pc-linux-gnu Host CPU: znver3 http://dlang.org - http://wiki.dlang.org/LDC $ dmd -betterC print.d && ./print && dmd --version 12 8 1 DMD64 D Compiler v2.109.1 Copyright (C) 1999-2024 by The D Language Foundation, All Rights Reserved written by Walter Bright --- So it's consistent. init is a `void[]` and p is a `void*` but I'm not sure about anything else like how is gcc inferring the alignment of the elements.
I think this is good enough to report upstream now. Should I do it sam?
Yes please if you'd be so kind
Reported upstream at https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117002
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=30a37b9022cdb0108ba04051eba37c0da9f60a50 commit 30a37b9022cdb0108ba04051eba37c0da9f60a50 Author: Sam James <sam@gentoo.org> AuthorDate: 2024-10-30 02:25:37 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2024-10-30 02:26:29 +0000 toolchain.eclass: filter -Warray-bounds if building D Bug: https://gcc.gnu.org/PR116975 Closes: https://bugs.gentoo.org/940750 Signed-off-by: Sam James <sam@gentoo.org> eclass/toolchain.eclass | 5 +++++ 1 file changed, 5 insertions(+)
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=379dfa64d11463d7f8bce41c3f260719de02e420 commit 379dfa64d11463d7f8bce41c3f260719de02e420 Author: Sam James <sam@gentoo.org> AuthorDate: 2025-04-06 00:07:43 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2025-04-06 00:07:43 +0000 sys-devel/gcc: add 14.2.1_p20250405 Bug: https://bugs.gentoo.org/940750 Signed-off-by: Sam James <sam@gentoo.org> sys-devel/gcc/Manifest | 1 + sys-devel/gcc/gcc-14.2.1_p20250405.ebuild | 57 +++++++++++++++++++++++++++++++ 2 files changed, 58 insertions(+)
