https://bugs.kde.org/show_bug.cgi?id=504938
Bug ID: 504938
Summary: Dolphin hangs indefinitely on reading
/usr/share/icons/hicolor/scalable/mimetypes/applicatio
n-x-ldraw.svgz when a file with that mimetype is found
in the directory being displayed
Classification: Applications
Product: dolphin
Version First 25.04.1
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: general
Assignee: dolphin-bugs-n...@kde.org
Reporter: ofe...@nowaker.net
CC: kfm-de...@kde.org
Target Milestone: ---
Created attachment 181839
--> https://bugs.kde.org/attachment.cgi?id=181839&action=edit
strace showing the hang on reading the XML
SUMMARY
Dolphin hangs indefinitely on reading
/usr/share/icons/hicolor/scalable/mimetypes/application-x-ldraw.svgz
STEPS TO REPRODUCE
1. Ensure the file
/usr/share/icons/hicolor/scalable/mimetypes/application-x-ldraw.svgz exists
(comes from the LDraw/LeoCAD icon theme package on this system) - or just dump
it as an SVG icon for a different mimetype present on your OS.
2. mkdir ~/test-ldraw && touch ~/test-ldraw/empty.dat
3. dolphin ~/test-ldraw
OBSERVED RESULT
Dolphin becomes unresponsive.
`strace` attached to the Dolphin process shows a tight loop of:
read(74</usr/share/icons/hicolor/scalable/mimetypes/application-x-ldraw.svgz>,
"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n<!-- Created
with Inkscape (http://www.inkscape.org/) -->\n\n<svg\n xmlns:"..., 16384) =
16384
read(74</usr/share/icons/hicolor/scalable/mimetypes/application-x-ldraw.svgz>,
"radient3374\"\n id=\"radialGradient2516\"\n
gradientUnits=\"userSpaceOnUse\"\n
gradientTransform=\"matrix(0.4070671,0,0"..., 16384) = 16384
brk(0x6278224b7000) = 0x6278224b7000
read(74</usr/share/icons/hicolor/scalable/mimetypes/application-x-ldraw.svgz>,
" -14.260452,-2.492588 -14.260452,-5.567354 0,-3.074766 6.384623,-5.5673542
14.260452,-5.5673542 7.875829,0 14.260452,2.4925882 1"..., 16384) = 2942
read(74</usr/share/icons/hicolor/scalable/mimetypes/application-x-ldraw.svgz>,
"", 13442) = 0
read(74</usr/share/icons/hicolor/scalable/mimetypes/application-x-ldraw.svgz>,
"", 16384) = 0
read(74</usr/share/icons/hicolor/scalable/mimetypes/application-x-ldraw.svgz>,
"", 16384) = 0
read(74</usr/share/icons/hicolor/scalable/mimetypes/application-x-ldraw.svgz>,
"", 16384) = 0
… (repeats forever)
Removing or moving the SVG icon file out of
/usr/share/icons/hicolor/scalable/mimetypes/
immediately stops the hang.
EXPECTED RESULT
Dolphin should display the directory normally; reading an SVG icon once should
not lock the GUI in an infinite read() loop.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 5.116.0
Qt Version: 5.15.16
Dolphin Version: 25.04.1
Kernel Version: 6.14.6-arch1-1
Graphics Platform: x11
ADDITIONAL INFORMATION
* The same directory opens instantly in other file managers (e.g. Krusader,
Thunar).
* Happens with any .dat file, even zero-byte ones, so content is not relevant.
* Regression status: unknown - the directory I opened dates back to a long time
ago; I didn't have a reason to navigate there in Dolphin for a long time
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