Bug 605804 – net-p2p/transmission-2.9.2-r2 (transmission-qt) segmentation fault after upgrade to qt-5.7.1

• Product: Gentoo Linux
• Status: RESOLVED NEEDINFO

[Description Thomas Stein 2017-01-15 18:53:22 UTC]

Hello Devs.

After upgrading qt from 5.6.1 to 5.7.1 transmission-qt exits with segmentation fault. Strange thing is this happens only when i have kde plasma running. When i start fluxbox transmission-qt starts just fine.

Any ideas?

thanks and cheers

Reproducible: Always




Portage 2.2.28 (python 2.7.10-final-0, default/linux/amd64/13.0/desktop/plasma, gcc-5.4.0, glibc-2.22-r2, 4.9.1 x86_64)
=================================================================
System uname: Linux-4.9.1-x86_64-Intel-R-_Core-TM-_i5-4200U_CPU_@_1.60GHz-with-gentoo-2.3
KiB Mem:     7864056 total,   1765680 free
KiB Swap:    2097148 total,   2097148 free
Timestamp of repository gentoo: Sat, 14 Jan 2017 15:00:01 +0000
sh bash 4.3_p46
ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1
app-shells/bash:          4.3_p46::gentoo
dev-java/java-config:     2.2.0-r3::gentoo
dev-lang/perl:            5.24.1_rc4::gentoo
dev-lang/python:          2.7.10-r2::gentoo, 3.4.3-r2::gentoo
dev-util/cmake:           3.6.0::gentoo
dev-util/pkgconfig:       0.28-r2::gentoo
sys-apps/baselayout:      2.3::gentoo
sys-apps/openrc:          0.21.7::gentoo
sys-apps/sandbox:         2.6-r1::gentoo
sys-devel/autoconf:       2.13::gentoo, 2.69::gentoo
sys-devel/automake:       1.11.6-r1::gentoo, 1.12.6-r1::gentoo, 1.13.4::gentoo, 1.14.1::gentoo, 1.15::gentoo
sys-devel/binutils:       2.25.1-r1::gentoo, 2.26.1::gentoo
sys-devel/gcc:            5.4.0::gentoo
sys-devel/gcc-config:     1.8::gentoo
sys-devel/libtool:        2.4.4::gentoo
sys-devel/make:           4.2.1::gentoo
sys-kernel/linux-headers: 4.3::gentoo (virtual/os-headers)
sys-libs/glibc:           2.22-r2::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000

x-portage
    location: /usr/local/portage
    masters: gentoo
    priority: 0

kde
    location: /var/lib/layman/kde
    masters: gentoo
    priority: 50

Installed sets: @kde-applications, @kde-frameworks, @kde-plasma
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /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="-O2 -pipe"
DISTDIR="/usr/portage/distfiles"
EMERGE_DEFAULT_OPTS="--autounmask-write y"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="en_GB.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j5"
PKGDIR="/usr/portage/packages"
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="X a52 aac acl acpi alsa amd64 berkdb bluetooth branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cups cxx dbus declarative dri dts dvd dvdr emboss encode exif fam firefox flac fortran gdbm gif glamor gpm gtk iconv ipv6 jpeg kde kipi lcms ldap libnotify mad mmx mmxext mng modules mp3 mp4 mpeg multilib ncurses nls nptl ogg opengl openmp pam pango pcre pdf phonon plasma png policykit ppds qml qt3support qt5 readline sdl seccomp semantic-desktop session spell sse sse2 ssl startup-notification svg tcpd tiff truetype udev udisks unicode upower usb vorbis widgets wxwidgets x264 xattr xcb xcomposite xinerama xml xscreensaver xv xvid zlib" ABI_X86="64" ALSA_CARDS="hda-intel usb-audio" 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" CPU_FLAGS_X86="mmx mmxext sse sse2" 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 ublox 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 de en_GB" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3 python3_4" RUBY_TARGETS="ruby22" 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:  CC, CPPFLAGS, CTARGET, CXX, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

[Comment 1 Mike Gilbert 2017-01-15 19:03:13 UTC]

I cannot reproduce the problem.

Have you tried rebuilding transmission?

[Comment 2 Thomas Stein 2017-01-15 19:23:48 UTC]

Hm. Good to know it's working somewhere. I rebuilt transmission like a million times. When i use gtk i can actually run transmission-gtk. So i guess i must have skrewed my system at some point. Any other ideas than rebuilding?

thanks for your help.
t.

[Comment 3 Mike Gilbert 2017-01-15 19:32:46 UTC]

Well, you could rebuild Qt and Transmission with debug symbols enabled, and get a backtrace from gdb. That would help isolate where the error is occuring.

This wiki article provides a comprehensive explanataion:

https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces

In short:

1. Enable FEATURES=split-debug or FEATURES=nostrip.
2. Rebuild transmission and dev-qt/qt* with "-g" in CFLAGS/CXXFLAGS.
3. Start transmission-qt using gdb.
4. Run "bt full" if/when you get a segfault.


I will probably refer you upstream unless the problem is an obvious Gentoo packaging issue.

[Comment 4 Thomas Stein 2017-01-15 20:14:27 UTC]

Hm. Ok. Does this strace output help? https://paste.ee/p/MQsMz
It seems transmission has trouble finding files.

thanks and cheers

[Comment 5 Mike Gilbert 2017-01-15 20:30:15 UTC]

It might be more useful if the pastebin didn't strip your line breaks. ;)

[Comment 6 Thomas Stein 2017-01-15 22:33:50 UTC]

I'll try to do a better one tomorrow.

cheers

[Comment 7 Thomas Stein 2017-01-16 15:20:48 UTC]

It seems all paste tools break the lines the wrong way. I'm going for the debug option now.

[Comment 8 Thomas Stein 2017-01-16 16:27:35 UTC]

Oh dear. Just tried qbittorrent. Crashes too. I'm trying to re-emerge qt now.

[Comment 9 Thomas Stein 2017-01-16 17:35:45 UTC]

qbitorrent is a little bit more verbose when crashing:

*************************************************************
Catching signal: ) = 81
write(2, "SIGSEGV", 7SIGSEGV)                  = 7
write(2, "\nPlease file a bug report at htt"..., 124
Please file a bug report at http://bug.qbittorrent.org and provide the following information:

qBittorrent version: v3.3.7
) = 124
write(2, "stack trace:\n", 13stack trace:
)          = 13
futex(0x7fac1936d190, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0x7fac195851b0, FUTEX_WAKE_PRIVATE, 2147483647) = 0
rt_sigaction(SIGSEGV, {SIG_DFL, [SEGV], SA_RESTORER|SA_RESTART, 0x7fac19006450}, {0x4b0f20, [SEGV], SA_RESTORER|SA_RESTART, 0x7fac19006450}, 8) = 0
tgkill(25976, 25976, SIGSEGV)           = 0
rt_sigreturn({mask=[]})                 = 140377159824992
--- SIGSEGV {si_signo=SIGSEGV, si_code=SI_TKILL, si_pid=25976, si_uid=1000} ---
+++ killed by SIGSEGV +++
Segmentation fault

Does that ring any bell?

thanks and cheers

[Comment 10 Mike Gilbert 2017-01-16 17:45:01 UTC]

Sorry, but I don't see any helpful information there.

[Comment 11 Thomas Stein 2017-01-21 10:10:34 UTC]

After emerge -uvND world the problem is gone. Must have been some skrew-up by me. Sorry for the noise.

thanks and cheers