[Bug 1882646] [NEW] kde-thumbnailer-deb chrashes when viewing deb files

[Mark Fraser]

Public bug reported:

When viewing a folder of deb packages in Dolphin Kubuntu 20.04, kde-
thumbnailer-deb crashes.

Application: kdeinit5 (kdeinit5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f145b1c04c0 (LWP 48104))]

Thread 3 (Thread 0x7f14510c0700 (LWP 48107)):
#0  __GI___libc_read (nbytes=16, buf=0x7f14510bfbe0, fd=18) at ../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=18, buf=0x7f14510bfbe0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f145cf9189f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f145cf48cfe in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f145cf49152 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f145cf492e3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f145e72b583 in QEventDispatcherGlib::processEvents (this=0x7f144c000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#7  0x00007f145e6d24db in QEventLoop::exec (this=this at entry=0x7f14510bfdf0, flags=..., flags at entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#8  0x00007f145e50a785 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#9  0x00007f145a68aefa in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x00007f145e50b9d2 in QThreadPrivate::start (arg=0x7f145a70dd80) at thread/qthread_unix.cpp:361
#11 0x00007f145d8f6609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#12 0x00007f145e37d103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f1458fa3700 (LWP 48105)):
#0  0x00007f145e37096f in __GI___poll (fds=0x7f1458fa2d28, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f145efe1c1a in ?? () from /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f145efe390a in xcb_wait_for_event () from /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f1459701298 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f145e50b9d2 in QThreadPrivate::start (arg=0x56065a4d96e0) at thread/qthread_unix.cpp:361
#5  0x00007f145d8f6609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f145e37d103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f145b1c04c0 (LWP 48104)):
[KCrash Handler]
#6  0x00007f145e590a19 in QStringView::QStringView<QString, true> (str=..., this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:257
#7  QString::endsWith (this=this at entry=0x56065ab28f88, s=..., cs=cs at entry=Qt::CaseSensitive) at tools/qstring.cpp:5154
#8  0x00007f144ad6f8f2 in DebThumbnailer::create (this=<optimized out>, path=..., width=128, height=128, img=...) at ./utils/qapt-deb-thumbnailer/DebThumbnailer.cpp:70
#9  0x00007f145f1c084d in ThumbnailProtocol::createSubThumbnail (this=this at entry=0x7ffe96b1b7d0, thumbnail=..., filePath=..., segmentWidth=segmentWidth at entry=108, segmentHeight=segmentHeight at entry=68) at ./thumbnail/thumbnail.cpp:727
#10 0x00007f145f1c0e6a in ThumbnailProtocol::drawSubThumbnail (this=this at entry=0x7ffe96b1b7d0, p=..., filePath=..., width=width at entry=108, height=height at entry=68, xPos=xPos at entry=19, yPos=76, frameWidth=3) at ./thumbnail/thumbnail.cpp:759
#11 0x00007f145f1c14cf in ThumbnailProtocol::thumbForDirectory (this=this at entry=0x7ffe96b1b7d0, directory=...) at ./thumbnail/thumbnail.cpp:562
#12 0x00007f145f1c2bc2 in ThumbnailProtocol::get (this=0x7ffe96b1b7d0, url=...) at ./thumbnail/thumbnail.cpp:238
#13 0x00007f145ab28fe6 in KIO::SlaveBase::dispatch (this=0x7ffe96b1b7d0, command=67, data=...) at ./src/core/slavebase.cpp:1197
#14 0x00007f145ab29686 in KIO::SlaveBase::dispatchLoop (this=this at entry=0x7ffe96b1b7d0) at ./src/core/slavebase.cpp:338
#15 0x00007f145f1bfb72 in kdemain (argc=<optimized out>, argv=0x56065a47ed50) at ./thumbnail/thumbnail.cpp:138
#16 0x00005606589dd77d in launch (argc=4, _name=0x56065a4b5388 "/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/thumbnail.so", args=<optimized out>, cwd=<optimized out>, envc=0, envs=<optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x5606589e0187 "0") at ./src/kdeinit/kinit.cpp:708
#17 0x00005606589de86a in handle_launcher_request (sock=8, who=<optimized out>) at ./src/kdeinit/kinit.cpp:1146
#18 0x00005606589df25a in handle_requests (waitForPid=0) at ./src/kdeinit/kinit.cpp:1339
#19 0x00005606589da12f in main (argc=5, argv=<optimized out>) at ./src/kdeinit/kinit.cpp:1777
[Inferior 1 (process 48104) detached]

** Affects: libqapt (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  kde-thumbnailer-deb chrashes when viewing deb files

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