Well, this ICE should amuse fans of Douglas Hofstadter: segmentation fault when failing to initialize self-referential struct member. (Which is impossible to initialize anyway, right?) The code is very small, so here it is: #include <vector> struct node { node &parent; }; void f() { std::vector<node> v; v.push_back({}); } It's worth noting that if the initialize is simple, ie: node foo = {}; then it won't segfault. There is something necessary in the matching of the function that causes it. A reference to a different type did not segfault, only self-referential. If you compile it in C++98 mode then you get more output and a hint as to what is going wrong. This line: test.cpp:13:19: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11 [enabled by default] repeated 167,737 times. Reproducible: Always Steps to Reproduce: 1. Compile the above C++ code. Actual Results: g++-4.8: internal compiler error: Segmentation fault (program cc1plus) Please submit a full bug report, with preprocessed source if appropriate. See <http://bugs.gentoo.org/> for instructions. Expected Results: test.cpp: In function ‘void f()’: test.cpp:11:17: error: uninitialized const member ‘node::parent’ Portage 2.2.1 (default/linux/amd64/13.0/desktop/kde, gcc-4.7.3, glibc-2.15-r3, 3.11.1-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-3.11.1-gentoo-x86_64-Intel-R-_Core-TM-_i5_CPU_M_580_@_2.67GHz-with-gentoo-2.2 KiB Mem: 7954132 total, 1224052 free KiB Swap: 4095996 total, 3892632 free Timestamp of tree: Fri, 04 Oct 2013 22:15:01 +0000 ld GNU ld (GNU Binutils) 2.23.1 app-shells/bash: 4.2_p45 dev-java/java-config: 2.1.12-r1 dev-lang/python: 2.7.5-r2, 3.2.5-r2 dev-util/cmake: 2.8.10.2-r2 dev-util/pkgconfig: 0.28 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.11.8 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.11.6, 1.12.6, 1.13.4 sys-devel/binutils: 2.23.1 sys-devel/gcc: 4.7.3, 4.8.1 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.2 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.9 (virtual/os-headers) sys-libs/glibc: 2.15-r3 Repositories: gentoo x11 seden sunrise dmol kde lisp mv java science local ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA Google-TOS google-talkplugin google-chrome FAH-EULA-2009 skype-4.0.0.7-copyright" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -w -march=native" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/themes/oxygen-gtk/gtk-2.0 /var/lib/hsqldb" 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 /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-O2 -pipe -w -march=native" DISTDIR="/var/tmp/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news 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wavpack wifi wmf wxwidgets x264 xcb xcomposite xinerama xml xpm xscreensaver xv xvid zeroconf zlib" ABI_X86="64" ALSA_CARDS="hda-intel" 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="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en_AU en_GB" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_2" RUBY_TARGETS="ruby19 ruby18" USERLAND="GNU" VIDEO_CARDS="intel" 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: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON ================================================================= Package Settings ================================================================= sys-devel/gcc-4.7.3 was built with the following: USE="cxx fortran graphite gtk lto mudflap (multilib) nls nptl openmp (policykit) (-altivec) -doc (-fixed-point) -gcj -go (-hardened) (-libssp) -multislot -nopie -nossp -objc -objc++ -objc-gc -regression-test -vanilla" ABI_X86="64" CFLAGS="-march=native -O2 -g -pipe -w" CXXFLAGS="-march=native -O2 -g -pipe -w" sys-devel/gcc-4.8.1 was built with the following: USE="cxx fortran graphite gtk lto mudflap (multilib) nls nptl openmp (policykit) (-altivec) -doc (-fixed-point) -gcj -go (-hardened) (-libssp) -multislot -nopie -nossp -objc -objc++ -objc-gc -regression-test -vanilla" ABI_X86="64" CFLAGS="-march=native -O2 -g -pipe -w" CXXFLAGS="-march=native -O2 -g -pipe -w"
Fixed upstream for 4.9. As this is invalid code I don't think we'll bother backporting it.
