When attempting to use the Git project integration in Kate I get the following: freddie@fdw-desktop $ kate QObject::connect: invalid null parameter QObject::connect: invalid null parameter QObject::connect: Cannot connect (null)::returnPressed() to KUrlRequester::returnPressed() QObject::connect: Cannot connect (null)::returnPressed(QString) to KUrlRequester::returnPressed(QString) *** Error in `kate': free(): invalid pointer: 0x00007feaec028a20 *** ======= Backtrace: ========= /lib64/libc.so.6(+0x6f1a3)[0x7feb09bf71a3] /lib64/libc.so.6(+0x74ac6)[0x7feb09bfcac6] /lib64/libc.so.6(+0x752ce)[0x7feb09bfd2ce] /usr/lib64/libgit2.so.24(git_libgit2_shutdown+0x89)[0x7feaf766c249] /usr/lib64/qt5/plugins/ktexteditor/kateprojectplugin.so(+0x21b1f)[0x7feafc19fb1f] /usr/lib64/qt5/plugins/ktexteditor/kateprojectplugin.so(+0x24816)[0x7feafc1a2816] /usr/lib64/qt5/plugins/ktexteditor/kateprojectplugin.so(+0x24bcf)[0x7feafc1a2bcf] /usr/lib64/qt5/plugins/ktexteditor/kateprojectplugin.so(+0x259d1)[0x7feafc1a39d1] /usr/lib64/qt5/plugins/ktexteditor/kateprojectplugin.so(+0x25e86)[0x7feafc1a3e86] /usr/lib64/libKF5ThreadWeaver.so.5(_ZN12ThreadWeaver8Executor3runERK14QSharedPointerINS_12JobInterfaceEEPNS_6ThreadE+0x47)[0x7feaf7baa6f7] /usr/lib64/libKF5ThreadWeaver.so.5(_ZN12ThreadWeaver3Job7executeERK14QSharedPointerINS_12JobInterfaceEEPNS_6ThreadE+0x40)[0x7feaf7ba9380] /usr/lib64/libKF5ThreadWeaver.so.5(_ZN12ThreadWeaver6Thread3runEv+0x80)[0x7feaf7ba8ad0] /usr/lib64/libQt5Core.so.5(+0xa82ac)[0x7feb0a6bf2ac] /lib64/libpthread.so.0(+0x7434)[0x7feb076a1434] /lib64/libc.so.6(clone+0x6d)[0x7feb09c6f8fd] where the issue appears to be in how Kate is calling git_libgit2_shutdown(). May be related to the following: https://gitweb.gentoo.org/proj/kde.git/commit/?id=57c2a20a71386e86ad4e49d5540b7e99ab28dd8d emerge --info: emerge --info Portage 2.3.0_rc1 (python 3.4.3-final-0, default/linux/amd64/13.0/desktop/plasma, gcc-4.9.3, glibc-2.23-r2, 4.5.2-gentoo x86_64) ================================================================= System uname: Linux-4.5.2-gentoo-x86_64-Intel-R-_Core-TM-_i7-5820K_CPU_@_3.30GHz-with-gentoo-2.2 KiB Mem: 64687316 total, 43100340 free KiB Swap: 0 total, 0 free Timestamp of repository gentoo: Mon, 16 May 2016 16:30:01 +0000 sh bash 4.3_p42-r2 ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1 app-shells/bash: 4.3_p42-r2::gentoo dev-java/java-config: 2.2.0-r3::gentoo dev-lang/perl: 5.22.2::gentoo dev-lang/python: 2.7.11-r2::gentoo, 3.4.3-r7::gentoo dev-util/cmake: 3.5.2::gentoo dev-util/pkgconfig: 0.29.1::gentoo sys-apps/baselayout: 2.2::gentoo sys-apps/openrc: 0.20.5::gentoo sys-apps/sandbox: 2.10-r2::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r2::gentoo sys-devel/automake: 1.14.1-r1::gentoo, 1.15-r2::gentoo sys-devel/binutils: 2.25.1-r1::gentoo sys-devel/gcc: 4.9.3::gentoo, 5.3.0::gentoo sys-devel/gcc-config: 1.8-r1::gentoo sys-devel/libtool: 2.4.6-r2::gentoo sys-devel/make: 4.1-r1::gentoo sys-kernel/linux-headers: 4.5::gentoo (virtual/os-headers) sys-libs/glibc: 2.23-r2::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=native" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /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 /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-O2 -pipe -march=native" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms splitdebug 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="-j11" 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 anacron berkdb bluetooth branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cryptsetup cups cxx dbus declarative dri dts dvd dvdr emboss encode exif fam firefox flac fortran gdbm gif glamor gpm gtk iconv icu ipv6 jpeg kde kerberos kipi latex lcms ldap libnotify logrotate mad mmx mmxext mng modules mp3 mp4 mpeg mpi multilib ncurses networkmanager nls nptl ogg opengl openmp pam pango pcre pdf phonon plasma png policykit ppds pulseaudio qml qt3support qt4 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="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" 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="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="nlpsolver" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby20 ruby21" USERLAND="GNU" VIDEO_CARDS="nvidia fglrx" 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, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
After looking at the source it appears as if Kate is calling libgit2 from within a worker thread. This appears to require that libgit2 be built with USE="threads". Adding this flag resolves the issue. (The libgit2 integration still does not function correctly, however, that is likely a different issue to the one reported here.)
(In reply to Freddie Witherden from comment #1) > After looking at the source it appears as if Kate is calling libgit2 from > within a worker thread. This appears to require that libgit2 be built with > USE="threads". Adding this flag resolves the issue. (The libgit2 > integration still does not function correctly, however, that is likely a > different issue to the one reported here.) Thanks. First issue is fixed here in Gentoo, the other has to be reported upstream. https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=11580f5fa80baa4f62520ab9f754eb5095373cbe
