$ STEAM_FRAME_FORCE_CLOSE=1 steam
/home/gentoo/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
/home/gentoo/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
Running Steam on gentoo  64-bit
/home/gentoo/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(1444853545)
Installing breakpad exception handler for appid(steam)/version(1444853545)
Installing breakpad exception handler for appid(steam)/version(1444853545)
Installing breakpad exception handler for appid(steam)/version(1444853545)
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70: non-double matrix element
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70: non-double matrix element
Fontconfig warning: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 78: saw unknown, expected number
[1019/172011:ERROR:main_delegate.cc(751)] Could not load cef_extensions.pak
[1019/172011:ERROR:browser_main_loop.cc(189)] Running without the SUID sandbox! See https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment for more information on developing with the sandbox on.
Installing breakpad exception handler for appid(steamwebhelper)/version(20151014123328)
Installing breakpad exception handler for appid(steamwebhelper)/version(1444826008)
[1019/172011:INFO:audio_manager_pulse.cc(258)] Failed to connect to the context.  Error: Connection refused
[1019/172011:ERROR:main_delegate.cc(751)] Could not load cef_extensions.pak
[1019/172011:ERROR:nss_util.cc(1007)] Failed to load NSS libraries.
Installing breakpad exception handler for appid(steamwebhelper)/version(20151014123328)
Installing breakpad exception handler for appid(steamwebhelper)/version(1444853545)
Installing breakpad exception handler for appid(steamwebhelper)/version(1444853545)
Installing breakpad exception handler for appid(steam)/version(1444853545)
Installing breakpad exception handler for appid(steam)/version(1444853545)
Installing breakpad exception handler for appid(steam)/version(1444853545)
Installing breakpad exception handler for appid(steam)/version(1444853545)
Installing breakpad exception handler for appid(steam)/version(1444853545)
Installing breakpad exception handler for appid(steam)/version(1444853545)
Wireless receiver firmware /home/gentoo/.local/share/Steam/ubuntu12_32/../controller_base/d0ggle.bin loaded, version 1442256398.
Installing breakpad exception handler for appid(steam)/version(1444853545)
Installing breakpad exception handler for appid(steam)/version(1444853545)
FillInMachineIDInfo took a total of 0 milliseconds
PulseAudio connect failed (used only for Mic Volume Control) with error: Access denied
assert_20151019172010_1.dmp[3570]: Uploading dump (out-of-process)
/tmp/dumps/assert_20151019172010_1.dmp
/home/gentoo/.local/share/Steam/steam.sh: line 756:  3533 Segmentation fault      $STEAM_DEBUGGER "$STEAMROOT/$STEAMEXEPATH" "$@"
assert_20151019172010_1.dmp[3570]: Finished uploading minidump (out-of-process): success = yes
assert_20151019172010_1.dmp[3570]: response: CrashID=bp-26a62fd0-c71c-4138-9441-210e12151019
assert_20151019172010_1.dmp[3570]: file ''/tmp/dumps/assert_20151019172010_1.dmp'', upload yes: ''CrashID=bp-26a62fd0-c71c-4138-9441-210e12151019''