Details
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Bug
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Resolution: Done
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P2: Important
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4.8.5
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None
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Arch Linux
kdbg 2.5.4
qt 4.8.5
KDE 4.11.3 (although the bug is WM independent)
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515617e55be9a7bfa738a9c32ef8b19065de37d4 9ae386653c321c8ddc10fad5ea88f32ebb3d3ffe
Description
I have been using kdbg happily for years, but recently it started crashing with the following error:
kdbg(13170)/kdeui (KIconLoader) KIconLoader::iconPath: Illegal icon group: 16
MNG error 1060: MHDR simplicity indicates unsupported feature(s); chunk MHDR; subcode 0:0
MNG error 11: Function is invalid at this point; chunk MHDR; subcode 0:0
The last line is then repeated ~27500 times. I reported this to the Arch Linux qt packager (https://bugs.archlinux.org/task/37093), who informed me that Arch had just upgraded to libmng 2.x, and since Qt doesn't support that yet, it now uses the internal libqmng. Therefore, it seems there is a bug in the Qt MNG code - or at least some error is being handled less gracefully than desired.
I collected the following stack trace, although it doesn't seem very useful:
#0 0x00007ffff51d469d in vfprintf () from /usr/lib/libc.so.6 #1 0x00007ffff51d9591 in buffered_vfprintf () from /usr/lib/libc.so.6 #2 0x00007ffff51d47ce in vfprintf () from /usr/lib/libc.so.6 #3 0x00007ffff51de717 in fprintf () from /usr/lib/libc.so.6 #4 0x00007ffff67758fc in qt_message_output(QtMsgType, char const*) () from /usr/lib/libQtCore.so.4 #5 0x00007ffff6775a99 in ?? () from /usr/lib/libQtCore.so.4 #6 0x00007ffff6775ce4 in qWarning(char const*, ...) () from /usr/lib/libQtCore.so.4 #7 0x00007fffea32ae10 in ?? () from /usr/lib/qt4/plugins/imageformats/libqmng.so #8 0x00007fffea34b144 in ?? () from /usr/lib/qt4/plugins/imageformats/libqmng.so #9 0x00007fffea34d5a1 in ?? () from /usr/lib/qt4/plugins/imageformats/libqmng.so #10 0x00007fffea32afa1 in ?? () from /usr/lib/qt4/plugins/imageformats/libqmng.so #11 0x00007ffff5ac5e34 in QImageReader::read(QImage*) () from /usr/lib/libQtGui.so.4 #12 0x00007ffff5ac6384 in QImageReader::read() () from /usr/lib/libQtGui.so.4 #13 0x00007ffff5addcb7 in ?? () from /usr/lib/libQtGui.so.4 #14 0x00007ffff5ade2ef in ?? () from /usr/lib/libQtGui.so.4 #15 0x00007ffff5ade547 in ?? () from /usr/lib/libQtGui.so.4 #16 0x00007ffff6893b48 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4 #17 0x00007ffff5ade66b in ?? () from /usr/lib/libQtGui.so.4
Attachments
| For Gerrit Dashboard: QTBUG-34894 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 72086,1 | Recognize newer libmng versions in config test | stable | qt/qtimageformats | Status: MERGED | +2 | 0 |
| 72092,2 | Recognize newer libmng versions in config test | 4.8 | qt/qt | Status: MERGED | +2 | 0 |