Created attachment 675379 [details] reduced testcase > g++-10.2.0 -Wno-deprecated -std=gnu++14 testcase.ii testcase.ii:58:77: internal compiler error: in output_constructor_regular_field, at varasm.c:5249 58 | void Get() { static auto kSchemas = MakeFixedFlatMap<int, int>({{"", ""}}); } | ^ Please submit a full bug report, with preprocessed source if appropriate. See <https://bugs.gentoo.org/> for instructions. This also triggers with gcc-9 and gcc-11. gcc-9 has reports an error on the original testcase, but not sure if this is related: error: function '...' defaulted on its redeclaration with an exception-specification that differs from the implicit exception-specification 'noexcept' 642 | auto flat_tree<Key, GetKeyFromValue, KeyCompare, Container>:: | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Portage 3.0.9 (python 3.7.9-final-0, default/linux/amd64/17.1, gcc-9.3.0, glibc-2.32-r2, 4.19.80-gentoo x86_64) ================================================================= System uname: Linux-4.19.80-gentoo-x86_64-Intel-R-_Xeon-R-_CPU_E5-1650_v3_@_3.50GHz-with-gentoo-2.7 KiB Mem: 98951536 total, 23131508 free KiB Swap: 536870908 total, 536856828 free Timestamp of repository gentoo: Fri, 27 Nov 2020 04:45:01 +0000 Head commit of repository gentoo: 2e53b60da81f0a51cd969af1ffbf0212c1b257ca Timestamp of repository stha09: Sat, 17 Oct 2020 09:10:12 +0000 Head commit of repository stha09: febf1dd2746f4e2c2138c8e580a72deb7e7b227b sh bash 5.0_p18 ld GNU ld (Gentoo 2.34 p6) 2.34.0 ccache version 3.7.12 [enabled] app-shells/bash: 5.0_p18::gentoo dev-java/java-config: 2.3.1::gentoo dev-lang/perl: 5.30.3::gentoo dev-lang/python: 2.7.18-r4::gentoo, 3.7.9::gentoo dev-util/ccache: 3.7.12::gentoo dev-util/cmake: 3.17.4-r1::gentoo dev-util/pkgconfig: 0.29.2::gentoo sys-apps/baselayout: 2.7::gentoo sys-apps/openrc: 0.42.1::gentoo sys-apps/sandbox: 2.20::gentoo sys-devel/autoconf: 2.69-r5::gentoo sys-devel/automake: 1.16.2-r1::gentoo sys-devel/binutils: 2.34-r2::gentoo sys-devel/gcc: 9.3.0-r1::gentoo, 10.2.0-r3::gentoo, 11.0.0_pre9999::gentoo sys-devel/gcc-config: 2.3.2-r1::gentoo sys-devel/libtool: 2.4.6-r6::gentoo sys-devel/make: 4.2.1-r4::gentoo sys-kernel/linux-headers: 5.4-r1::gentoo (virtual/os-headers) sys-libs/glibc: 2.32-r2::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.de.gentoo.org/gentoo-portage priority: -1000 sync-rsync-verify-metamanifest: no sync-rsync-extra-opts: sync-rsync-verify-max-age: 24 sync-rsync-verify-jobs: 1 local location: /usr/local/portage masters: gentoo priority: 0 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=x86-64 -mtune=generic -fomit-frame-pointer" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe -march=x86-64 -mtune=generic -fomit-frame-pointer" DISTDIR="/var/tmp/distfiles" ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY 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" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs ccache config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news nostrip parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe -march=x86-64 -mtune=generic -fomit-frame-pointer" GENTOO_MIRRORS="http://mirror.netcologne.de/gentoo/ http://ftp.halifax.rwth-aachen.de/gentoo/" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="de en" MAKEOPTS="-j18" PKGDIR="/var/tmp/packages/gcc9" 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" USE="acl amd64 berkdb bzip2 cli crypt dri fortran gdbm iconv ipv6 libglvnd libtirpc multilib ncurses nls nptl openmp pam pcre readline seccomp split-usr ssl tcpd unicode xattr zlib" ABI_X86="64" ADA_TARGET="gnat_2018" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache 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="mmx mmxext sse sse2" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput" KERNEL="linux" L10N="de en" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-2 php7-3 php7-4" POSTGRES_TARGETS="postgres10 postgres11" PYTHON_SINGLE_TARGET="python3_7" PYTHON_TARGETS="python2_7 python3_7" RUBY_TARGETS="ruby25 ruby26" USERLAND="GNU" VIDEO_CARDS="amdgpu fbdev intel nouveau radeon radeonsi vesa dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
-std=gnu++14 isn't needed on reduced testcase, only original source required it.
Confirmed. Also happens on gcc-11. Upstream bug tracker has quite a few output_constructor_regular_field crashes. Let's see which one of those it is.
I think it's https://gcc.gnu.org/PR96863 ([[no_unique_address]]).
(In reply to Sergei Trofimovich from comment #3) > I think it's https://gcc.gnu.org/PR96863 ([[no_unique_address]]). Slight simplification in templates yields the following minimal example: """ struct less {}; struct flat_tree { constexpr flat_tree(char *str) : ptr_(str), comp_() {} char *ptr_; [[no_unique_address]] less comp_; } kSchemas{""}; """
