Created attachment 138273 [details]
kdeinit5 doesn't have a bug reporting address ... should it? (crash info considered useful)

SUMMARY
Seg fault in kdeinit5

STEPS TO REPRODUCE
1. download this form: https://www.irs.gov/pub/irs-pdf/f1040.pdf
2. open the form in Firefox (v88.0)
3. modify a couple of pdf form fields and then press "Download" button on the firefox pdf viewer to save the modified form to disk

OBSERVED RESULT
things seem to work ok, but the crash handler appears; it's not clear to me what  the process that crashed was supposed to do

-- Backtrace:
Application: kdeinit5 (kdeinit5), signal: Segmentation fault
Content of s_kcrashErrorMessage: [Current thread is 1 (Thread 0x7f6161678cc0 (LWP 19499))]
[KCrash Handler]
#6  __memmove_avx_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:269
#7  0x00007f615f987f81 in memcpy (__len=50176, __src=<optimized out>, __dest=0x7f615cb1f000) at /usr/include/bits/string_fortified.h:29
#8  ThumbnailProtocol::get (this=0x7ffd4247ea50, url=...) at /usr/src/debug/kio-extras5-21.04.0-1.1.x86_64/thumbnail/thumbnail.cpp:301
#9  0x00007f615fa13ee6 in KIO::SlaveBase::dispatch (this=0x7ffd4247ea50, command=67, data=...) at /usr/src/debug/kio-5.81.0-1.2.x86_64/src/core/slavebase.cpp:1215
#10 0x00007f615fa0b8c6 in KIO::SlaveBase::dispatchLoop (this=0x7ffd4247ea50) at /usr/src/debug/kio-5.81.0-1.2.x86_64/src/core/slavebase.cpp:336
#11 0x00007f615f984786 in kdemain (argc=<optimized out>, argv=0x55cd6f503fd0) at /usr/src/debug/kio-extras5-21.04.0-1.1.x86_64/thumbnail/thumbnail.cpp:124
#12 0x000055cd6eae2c07 in launch (argc=argc@entry=4, _name=_name@entry=0x55cd6f503f08 "/usr/lib64/qt5/plugins/kf5/kio/thumbnail.so", args=<optimized out>, args@entry=0x55cd6f503f34 "thumbnail", cwd=cwd@entry=0x0, envc=envc@entry=0, envs=envs@entry=0x55cd6f503fb3 "", reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x55cd6eae5175 "0") at /usr/src/debug/kinit-5.81.0-1.2.x86_64/src/kdeinit/kinit.cpp:692
#13 0x000055cd6eae43a8 in handle_launcher_request (sock=8, who=<optimized out>) at /usr/src/debug/kinit-5.81.0-1.2.x86_64/src/kdeinit/kinit.cpp:1130
#14 0x000055cd6eae4a36 in handle_requests (waitForPid=waitForPid@entry=0) at /usr/src/debug/kinit-5.81.0-1.2.x86_64/src/kdeinit/kinit.cpp:1323
#15 0x000055cd6eadf623 in main (argc=3, argv=<optimized out>) at /usr/src/debug/kinit-5.81.0-1.2.x86_64/src/kdeinit/kinit.cpp:1761
[Inferior 1 (process 19499) detached]

EXPECTED RESULT
no crash

SYSTEM INFO
Operating System: openSUSE Tumbleweed 20210507
KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.81.0
Qt Version: 5.15.2
Kernel Version: 5.12.0-2-default
OS Type: 64-bit
Graphics Platform: X11
Processors: 4 × Intel® Core™ i5-4200U CPU @ 1.60GHz
Memory: 3.7 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics 4400