Matplotlib crashes for any (included) example with >>> plt.plot(x,y) QObject::connect: Cannot connect NavigationToolbar2QT::message(QString) to (null)::_show_message() Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line 3147, in plot ax = gca() File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line 928, in gca return gcf().gca(**kwargs) File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line 578, in gcf return figure() File "/usr/lib64/python3.5/site-packages/matplotlib/pyplot.py", line 527, in figure **kwargs) File "/usr/lib64/python3.5/site-packages/matplotlib/backends/backend_qt5agg.py", line 43, in new_figure_manager return new_figure_manager_given_figure(num, thisFig) File "/usr/lib64/python3.5/site-packages/matplotlib/backends/backend_qt5agg.py", line 51, in new_figure_manager_given_figure return FigureManagerQT(canvas, num) File "/usr/lib64/python3.5/site-packages/matplotlib/backends/backend_qt5.py", line 465, in __init__ self.toolbar.message.connect(self._show_message) TypeError: connect() failed between NavigationToolbar2QT.message[str] and _show_message() emerge --info dev-python/matplotlib Portage 2.3.0 (python 3.5.2-final-0, default/linux/amd64/13.0/desktop, gcc-5.4.0, glibc-2.23-r2, 4.7.0 x86_64) ================================================================= System Settings ================================================================= System uname: Linux-4.7.0-x86_64-AMD_Phenom-tm-_II_X4_940_Processor-with-gentoo-2.2 KiB Mem: 7905836 total, 1461336 free KiB Swap: 4194300 total, 4080756 free Timestamp of repository gentoo: Wed, 03 Aug 2016 07:15:01 +0000 sh bash 4.3_p46 ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1 ccache version 3.2.7 [disabled] app-shells/bash: 4.3_p46::gentoo dev-java/java-config: 2.2.0-r3::gentoo dev-lang/perl: 5.24.0-r1::gentoo dev-lang/python: 2.7.12::gentoo, 3.4.3-r7::gentoo, 3.5.2::gentoo dev-util/ccache: 3.2.7::gentoo dev-util/cmake: 3.6.1::gentoo dev-util/pkgconfig: 0.29.1::gentoo sys-apps/baselayout: 2.2-r1::gentoo sys-apps/openrc: 0.21.3::gentoo sys-apps/sandbox: 2.10-r2::gentoo sys-devel/autoconf: 2.13::gentoo, 2.69-r2::gentoo sys-devel/automake: 1.9.6-r4::gentoo, 1.10.3-r2::gentoo, 1.11.6-r2::gentoo, 1.12.6-r1::gentoo, 1.13.4-r1::gentoo, 1.14.1-r1::gentoo, 1.15-r2::gentoo sys-devel/binutils: 2.25.1-r1::gentoo, 2.26.1::gentoo sys-devel/gcc: 4.9.3::gentoo, 5.3.0::local, 5.4.0::gentoo sys-devel/gcc-config: 1.8-r1::gentoo sys-devel/libtool: 2.4.6-r2::gentoo sys-devel/make: 4.2.1::gentoo sys-kernel/linux-headers: 4.7::gentoo (virtual/os-headers) sys-libs/glibc: 2.23-r2::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.de.gentoo.org/gentoo-portage priority: -1000 local location: /usr/local/portage masters: gentoo priority: 0 java location: /usr/local/portage/layman/java sync-type: laymansync sync-uri: git://anongit.gentoo.org/proj/java.git masters: gentoo priority: 50 lisp location: /usr/local/portage/layman/lisp sync-type: laymansync sync-uri: git://anongit.gentoo.org/proj/lisp.git masters: gentoo priority: 50 science location: /usr/local/portage/layman/science sync-type: laymansync sync-uri: git://anongit.gentoo.org/proj/sci.git masters: gentoo priority: 50 sunrise location: /usr/local/portage/layman/sunrise sync-type: laymansync sync-uri: git://anongit.gentoo.org/proj/sunrise-reviewed.git masters: gentoo priority: 50 x11 location: /usr/local/portage/layman/x11 sync-type: laymansync sync-uri: git://anongit.gentoo.org/proj/x11 masters: gentoo priority: 50 ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-mtune=native -O2 -msse3 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/config /usr/share/gnupg/qualified.txt /var/lib/hsqldb" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php7.0/ext-active/ /etc/php/cgi-php7.0/ext-active/ /etc/php/cli-php7.0/ext-active/ /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="-mtune=native -O2 -msse3 -pipe" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs buildpkg 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="ftp://sunsite.informatik.rwth-aachen.de/pub/Linux/gentoo " LANG="en_US.iso88591" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j4" 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="3dnow 3dnowext 3dnowprefetch X a52 aac acl acpi alsa amd64 avahi berkdb branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cups cxx dbus dri dts dvd dvdr emboss encode exif fam ffmpeg fftw firefox flac fortran fuse gdbm gfortran gif gimp glamor gpm gtk gtk3 iconv ipv6 jpeg lapack lcms libnotify mad mmx mmxext mng modules mp3 mp4 mpeg multilib ncurses nls nptl nptlonly ogg opengl openmp pam pango pcre pdf png policykit ppds python qt qt3support qt4 qt5 readline sdl seccomp session smp spell sqlite sqlite3 sse sse2 sse3 sse4a ssl startup-notification svg tcl tcpd threads tiff tk truetype udev udisks unicode upower usb vorbis wxwidgets x264 xattr xcb xml xulrunner 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="3dnow mmx 3dnowext mmxext popcnt sse sse2 sse3 sse4a" 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" GRUB_PLATFORMS="pc multiboot" INPUT_DEVICES="keyboard mouse evdev wacom" KERNEL="linux" L10N="en de" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en de" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python3_5" PYTHON_TARGETS="python3_5" RUBY_TARGETS="ruby23" USERLAND="GNU" VIDEO_CARDS="radeon radeonsi" 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 ================================================================= Package Settings ================================================================= dev-python/matplotlib-1.5.1::gentoo was built with the following: USE="cairo examples gtk3 latex pyside qt5 tk -doc -excel -fltk -gtk2 -qt4 -test -wxwidgets" ABI_X86="64" PYTHON_TARGETS="python2_7 python3_5 -python3_3 -python3_4" CFLAGS="-mtune=native -O2 -msse3 -pipe -fno-strict-aliasing" CXXFLAGS="-mtune=native -O2 -msse3 -pipe -fno-strict-aliasing"
The bug has been fixed in the source repository. Please add the patch https://github.com/matplotlib/matplotlib/issues/6853 otherwise the qt5 backend doesn't work at all.
*** Bug 591814 has been marked as a duplicate of this bug. ***
1.5.3 should fix it. commit dd36b6b07773e6c5fea7000c6ae288795787f6ea Author: David Seifert <soap@gentoo.org> Date: Sat Sep 10 23:13:40 2016 +0200 dev-python/matplotlib: Version bump to 1.5.3 Gentoo-bug: 590396 * EAPI=6
