After upgrading to 5.21-r1, xlock segfaults with no error message: # xlock Segmentation fault # downgrading to 5.17-r1 solved the problem HAL2000 xlockmore # emerge --info Portage 2.1_pre7-r4 (default-linux/x86/2005.0, gcc-4.1.0, glibc-2.4-r1, 2.6.11ac7 i686) ================================================================= System uname: 2.6.11ac7 i686 Intel(R) Pentium(R) 4 CPU 2.80GHz Gentoo Base System version 1.12.0_pre16 dev-lang/python: 2.3.5, 2.4.2-r1 sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2 sys-devel/binutils: 2.16.1-r2 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r3 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-march=pentium4 -O2 -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/eselect/compiler /etc/gconf /etc/revdep-rebuild /etc/terminfo /etc/env.d" CXXFLAGS="-march=pentium4 -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks metadata-transfer sandbox sfperms strict" GENTOO_MIRRORS="ftp://ftp.uni-erlangen.de/pub/mirrors/gentoo " LANG="en_GB.utf8" LC_ALL="en_GB.utf8" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 X alsa avi berkdb bitmap-fonts cairo cpudetection crypt cups dillo dri dvd eds emboss encode firefox foomaticdb fortran gdbm gif gpm gstreamer gtk gtk2 imlib ipv6 isdnlog jpeg libg++ libwww mad maildir mbox mikmod mmx moznoxft mp3 mpeg ncurses nls nntp nptl nptlonly ogg oggvorbis opengl oracle pam pcrei pdflib perl png pppd python quicktime readline samba spell sse sse2 ssl tcpd theora truetype truetype-fonts type1-fonts unicode vorbis win32codecs xml2 xv xvid zlib elibc_glibc input_devices_keyboard input_devices_mouse kernel_linux userland_GNU video_cards_ati video_cards_vesa video_cards_fbdev" Unset: ASFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LDFLAGS, LINGUAS
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