Funtoo gcc-5.3.0-rc1 fail build log

# emerge --info '=sys-devel/gcc-5.3.0-r1::core-kit'
Portage 2.3.8 (python 2.7.13-final-0, funtoo/1.0/linux-gnu/arch/x86-64bit, gcc-5.3.0, glibc-2.23-r4, 4.8.15-1 x86_64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-4.8.15-1-x86_64-Intel-R-_Pentium-R-_CPU_N3530_@_2.16GHz-with-gentoo-2.2.1
KiB Mem:     3933540 total,   2425792 free
KiB Swap:    2097148 total,   2097148 free
sh bash 4.4_p12-r1
ld GNU ld (Gentoo 2.28 p1.2) 2.28
app-shells/bash:          4.4_p12-r1::core-kit
dev-lang/perl:            5.24.0-r2::perl-kit
dev-lang/python:          2.7.13::python-kit, 3.4.6::python-kit
dev-util/cmake:           3.8.0::core-kit
sys-apps/baselayout:      2.2.1::core-kit
sys-apps/openrc:          0.23.2::core-kit
sys-apps/sandbox:         2.10-r4::core-kit
sys-devel/autoconf:       2.13::core-kit, 2.69-r2::core-kit
sys-devel/automake:       1.13.4-r1::core-kit, 1.14.1-r1::core-kit, 1.15-r2::core-kit
sys-devel/binutils:       2.28-r3::core-kit
sys-devel/gcc:            5.3.0-r1::core-kit
sys-devel/gcc-config:     1.8-r1::core-kit
sys-devel/libtool:        2.4.6-r4::core-kit
sys-devel/make:           4.1-r1::core-kit
sys-kernel/linux-headers: 4.9::core-kit (virtual/os-headers)
sys-libs/glibc:           2.23-r4::core-kit
Repositories:

nokit
    location: /var/git/meta-repo/kits/nokit
    masters: core-kit
    priority: -500

core-hw-kit
    location: /var/git/meta-repo/kits/core-hw-kit
    masters: core-kit
    priority: 1

core-kit
    location: /var/git/meta-repo/kits/core-kit
    priority: 1
    aliases: gentoo

desktop-kit
    location: /var/git/meta-repo/kits/desktop-kit
    masters: core-kit
    priority: 1

dev-kit
    location: /var/git/meta-repo/kits/dev-kit
    masters: core-kit
    priority: 1

editors-kit
    location: /var/git/meta-repo/kits/editors-kit
    masters: core-kit
    priority: 1

games-kit
    location: /var/git/meta-repo/kits/games-kit
    masters: core-kit
    priority: 1

java-kit
    location: /var/git/meta-repo/kits/java-kit
    masters: core-kit
    priority: 1

kde-kit
    location: /var/git/meta-repo/kits/kde-kit
    masters: core-kit
    priority: 1

media-kit
    location: /var/git/meta-repo/kits/media-kit
    masters: core-kit
    priority: 1

net-kit
    location: /var/git/meta-repo/kits/net-kit
    masters: core-kit
    priority: 1

perl-kit
    location: /var/git/meta-repo/kits/perl-kit
    masters: core-kit
    priority: 1

php-kit
    location: /var/git/meta-repo/kits/php-kit
    masters: core-kit
    priority: 1

python-kit
    location: /var/git/meta-repo/kits/python-kit
    masters: core-kit
    priority: 1

security-kit
    location: /var/git/meta-repo/kits/security-kit
    masters: core-kit
    priority: 1

text-kit
    location: /var/git/meta-repo/kits/text-kit
    masters: core-kit
    priority: 1

xorg-kit
    location: /var/git/meta-repo/kits/xorg-kit
    masters: core-kit
    priority: 1

gnome-kit
    location: /var/git/meta-repo/kits/gnome-kit
    masters: core-kit
    priority: 10

science-kit
    location: /var/git/meta-repo/kits/science-kit
    masters: core-kit
    priority: 10

ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA Oracle-BCLA-JavaSE"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/gnupg/qualified.txt"
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/terminfo"
CXXFLAGS="-march=native -O2 -pipe"
DISTDIR="/var/cache/portage/distfiles"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync multilib-strict news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-march=silvermont -O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="ru_RU.utf8"
LDFLAGS="-Wl,-O1 -Wl,--sort-common -Wl,--as-needed"
LINGUAS="en_US ru_RU"
MAKEOPTS="-j5"
PKGDIR="/var/cache/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_TMPDIR="/var/tmp"
USE="X a52 aac acl alsa amd64 apng berkdb bluray bzip2 cdda cddb cdio cdr consolekit core-kit cracklib crypt cups cxx dbus dri dts dvd dvdr dvdread encode exif faac faad ffmpeg flac flv gdbm gif gpm ico iconv icu ieee1394 introspection ios ipod ipv6 jpeg jpeg2k lame libass libguess libmpeg2 libnotify lock mad matroska mjpeg mmx modules mp3 mpeg mtp mudflap multilib ncurses networkamager nls nptl nsplugin ogg opengl openmp pam pcre pdf png policykit postproc ppapi pppd python quicktime readline resolvconf session sndfile sse sse2 ssl startup-notification svg taglib tcpd theora thunar tiff truetype twolame udev unicode v4l vorbis vpx wav wavpack webp win32codecs wmf x264 x265 xattr xml xvid zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel ice1724 intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="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 authn_core authz_core socache_shmcb unixd" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" GRUB_PLATFORMS="efi-64 pc" INPUT_DEVICES="evdev synaptics keyboard mouse" KERNEL="linux" L10N="en-US ru-RU" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en_US ru_RU" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" POSTGRES_TARGETS="postgres9_5" PYTHON_SINGLE_TARGET="python3_4" PYTHON_TARGETS="python2_7 python3_4" QEMU_SOFTMMU_TARGETS="i386 x86_64" QEMU_USER_TARGETS="i386 x86_64" RUBY_TARGETS="ruby21 ruby22 ruby23 ruby24" 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

=================================================================
                        Package Settings
=================================================================

sys-devel/gcc-5.3.0-r1::core-kit was built with the following:
USE="cxx fortran nls openmp -ada (-altivec) -doc (-go) -graphite (-hardened) (-libssp) (-multilib) -objc -objc++ (-sanitize) -vanilla"
CFLAGS="-march=silvermont -O2 -pipe"
CXXFLAGS="-march=silvermont -O2 -pipe"