https://bugs.kde.org/show_bug.cgi?id=400447
Bug ID: 400447
Summary: canotor.knsrc causes plasma-discover to hang when
opening
Product: cantor
Version: 18.08
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: fil...@kde.org
Reporter: claudius+...@hausnetz.lettenbach.com
CC: alexander.se...@web.de, alexanderrie...@gmail.com
Target Milestone: ---
plasma-discover uses 100% cpu and seems to hang/freeze for several minutes when
cantor*.knsrc files reside in /etc/xdg
STEPS TO REPRODUCE
1. install cantor
2. open discover
OBSERVED RESULT
the discover UI freezes for several minutes and these messages appear on stdout
while plasma-discover memory consumption rises to about 800MB:
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor_scilab.knsrc" because: "All categories
are missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor_scilab.knsrc"
kns error "/etc/xdg/cantor_scilab.knsrc" "Invalid Cantor_scilab backend,
contact your distributor."
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor_qalculate.knsrc" because: "All categories
are missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor_qalculate.knsrc"
kns error "/etc/xdg/cantor_qalculate.knsrc" "Invalid Cantor_qalculate backend,
contact your distributor."
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor_sage.knsrc" because: "All categories are
missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor_sage.knsrc"
kns error "/etc/xdg/cantor_sage.knsrc" "Invalid Cantor_sage backend, contact
your distributor."
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor_kalgebra.knsrc" because: "All categories
are missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor_kalgebra.knsrc"
kns error "/etc/xdg/cantor_kalgebra.knsrc" "Invalid Cantor_kalgebra backend,
contact your distributor."
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor.knsrc" because: "All categories are
missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor.knsrc"
kns error "/etc/xdg/cantor.knsrc" "Invalid Cantor backend, contact your
distributor."
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor_maxima.knsrc" because: "All categories
are missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor_maxima.knsrc"
kns error "/etc/xdg/cantor_maxima.knsrc" "Invalid Cantor_maxima backend,
contact your distributor."
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor_lua.knsrc" because: "All categories are
missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor_lua.knsrc"
kns error "/etc/xdg/cantor_lua.knsrc" "Invalid Cantor_lua backend, contact your
distributor."
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor_python3.knsrc" because: "All categories
are missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor_python3.knsrc"
kns error "/etc/xdg/cantor_python3.knsrc" "Invalid Cantor_python3 backend,
contact your distributor."
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor_python2.knsrc" because: "All categories
are missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor_python2.knsrc"
kns error "/etc/xdg/cantor_python2.knsrc" "Invalid Cantor_python2 backend,
contact your distributor."
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor_octave.knsrc" because: "All categories
are missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor_octave.knsrc"
kns error "/etc/xdg/cantor_octave.knsrc" "Invalid Cantor_octave backend,
contact your distributor."
org.kde.knewstuff.core: Could not find category "Cantor (Python 3)"
org.kde.knewstuff.core: Could not find category "Cantor (KAlgebra)"
org.kde.knewstuff.core: Could not find category "Cantor (Python 2)"
org.kde.knewstuff.core: Could not find category "Cantor (Scilab)"
org.kde.knewstuff.core: Could not find category "Cantor (Octave)"
org.kde.knewstuff.core: Could not find category "Cantor (Sage)"
org.kde.knewstuff.core: Could not find category "Cantor (Maxima)"
org.kde.knewstuff.core: Could not find category "Cantor (R)"
org.kde.knewstuff.core: Could not find category "Cantor (Lua)"
org.kde.knewstuff.core: Could not find category "Cantor (Qalculate)"
invalid kns backend! "/etc/xdg/cantor_r.knsrc" because: "All categories are
missing"
org.kde.plasma.libdiscover: Discarding invalid backend "cantor_r.knsrc"
kns error "/etc/xdg/cantor_r.knsrc" "Invalid Cantor_r backend, contact your
distributor."
org.kde.knewstuff.core: Could not find category "Parley"
org.kde.knewstuff.core: "Socket operation timed out"
kns error "/etc/xdg/kalzium.knsrc" "Loading of providers from file:
http://data.kstuff.org/cgi-bin/hotstuff-provider?site=kalzium failed"
qml: message: kalzium.knsrc: Loading of providers from file:
http://data.kstuff.org/cgi-bin/hotstuff-provider?site=kalzium failed
PackageKit stopped running!
EXPECTED RESULT
Normal startup of discover. Memory consumption is maybe a bug in
appstream/discover.
SOFTWARE VERSIONS
(available in About System)
KDE Plasma Version: 5.14.2
KDE Frameworks Version: 5.51.0
Qt Version: 5.11.2
Using Arch packages:
cantor 18.08.2-1
appstream-0.12.3-1
discover-5.14.2-1
ADDITIONAL INFORMATION
When cantor is not installed opening discover works fine.
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