Bug 504746

SUMMARY
I’m using Fedora 42 KDE installed on a small x86_64 tablet and some weeks ago I noticed that Discover is not opening anymore. Trying to opening through terminal it just shows “Illegal instruction (core dumped)”.

Searching on google I found this case that looks similar: https://bugs.kde.org/show_bug.cgi?id=465548
I've also posted this bug here: https://bugzilla.redhat.com/show_bug.cgi?id=2366248


Machine details:
Operating System: Fedora Linux 42
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.13.0
Qt Version: 6.9.0
Kernel Version: 6.14.5-300.fc42.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 2 × Intel® Celeron® CPU N3350 @ 1.10GHz
Memory: 3.7 GiB of RAM
Graphics Processor: Intel® HD Graphics 500



$ plasma-discover --version
Illegal instruction (core dumped)

$ gdb plasma-discover
GNU gdb (Fedora Linux) 16.2-3.fc42
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Reading symbols from plasma-discover...

This GDB supports auto-downloading debuginfo from the following URLs:
  <https://debuginfod.fedoraproject.org/>
Enable debuginfod for this session? (y or [n]) y
Debuginfod has been enabled.
To make this setting permanent, add 'set debuginfod enabled on' to .gdbinit.
Downloading separate debug info for /usr/bin/plasma-discover
Reading symbols from /home/cansei/.cache/debuginfod_client/7cbd415d4ace4dae82a793acfc37b2fc3a78c3b3/debuginfo...                                                       
(gdb) thread apply all bt
(gdb) r
Starting program: /usr/bin/plasma-discover 
Function(s) ^std::(move|forward|as_const|(__)?addressof) will be skipped when stepping.
Function(s) ^std::(shared|unique)_ptr<.*>::(get|operator) will be skipped when stepping.
Function(s) ^std::(basic_string|vector|array|deque|(forward_)?list|(unordered_|flat_)?(multi)?(map|set)|span)<.*>::(c?r?(begin|end)|front|back|data|size|empty) will be skipped when stepping.
Function(s) ^std::(basic_string|vector|array|deque|span)<.*>::operator.] will be skipped when stepping.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7fffe09ff6c0 (LWP 4183)]
[New Thread 0x7fffdfa2a6c0 (LWP 4184)]
[New Thread 0x7fffdf2296c0 (LWP 4185)]
[New Thread 0x7fffde5406c0 (LWP 4187)]
[New Thread 0x7fffddd3f6c0 (LWP 4188)]
[New Thread 0x7fffdd52e6c0 (LWP 4189)]
[New Thread 0x7fffdccb86c0 (LWP 4190)]
[New Thread 0x7fffd11ff6c0 (LWP 4191)]
[New Thread 0x7fffd09fe6c0 (LWP 4192)]
[Thread 0x7fffd09fe6c0 (LWP 4192) exited]
[Thread 0x7fffd11ff6c0 (LWP 4191) exited]
[Thread 0x7fffdccb86c0 (LWP 4190) exited]
[Thread 0x7fffdd52e6c0 (LWP 4189) exited]

Thread 1 "plasma-discover" received signal SIGILL, Illegal instruction.
0x00007fffc1f43b55 in lcevc_dec::decoder::Pool<lcevc_dec::decoder::Decoder>::Pool(unsigned long) () from /lib64/liblcevc_dec_api.so.3
Missing rpms, try: dnf --enablerepo='*debug*' install kf6-kio-core-libs-debuginfo-6.13.0-2.fc42.switcheroo.x86_64 kf6-kio-file-widgets-debuginfo-6.13.0-2.fc42.switcheroo.x86_64 kf6-kio-widgets-libs-debuginfo-6.13.0-2.fc42.switcheroo.x86_64 kf6-kio-gui-debuginfo-6.13.0-2.fc42.switcheroo.x86_64 libavformat-debuginfo-7.1.1-1.fc42.x86_64 libavcodec-debuginfo-7.1.1-1.fc42.x86_64 libavutil-debuginfo-7.1.1-1.fc42.x86_64 openh264-debuginfo-2.4.1-2.fc42.x86_64 librtmp-debuginfo-2.6^20240301git6f6bb13-1.fc42.x86_64 libswresample-debuginfo-7.1.1-1.fc42.x86_64 LCEVCdec-debuginfo-3.3.5-1.fc42.x86_64 davs2-libs-debuginfo-1.7-1.20220903gitb41cf11.fc42.x86_64 uavs3d-libs-debuginfo-1.2.0-4.20230223git1fd0491.fc42.x86_64 vvenc-libs-debuginfo-1.12.1-1.fc42.x86_64 x264-bootstrap-libs-debuginfo-0.0.164-15.20231001git31e19f92_bootstrap.fc42.x86_64 x265-libs-debuginfo-4.1-1.fc42.x86_64 libxavs-debuginfo-0.1.55-1.fc42.x86_64 xavs2-libs-debuginfo-1.4-1.20190422giteae1e8b.fc42.x86_64 kvazaar-libs-debuginfo-2.3.1-2.fc42.x86_64
(gdb) disas /s $pc-10,+20
Dump of assembler code from 0x7fffc079eb4b to 0x7fffc079eb5f:
0x00007fffc079eb4b <_ZN9lcevc_dec7decoder4PoolINS0_7DecoderEEC2Em+43> : pop %rsp
0x00007fffc079eb4c <_ZN9lcevc_dec7decoder4PoolINS0_7DecoderEEC2Em+44> : and $0x18,%al
0x00007fffc079eb4e <_ZN9lcevc_dec7decoder4PoolINS0_7DecoderEEC2Em+46> : mov %rdi,%rbx
0x00007fffc079eb51 <_ZN9lcevc_dec7decoder4PoolINS0_7DecoderEEC2Em+49> : add $0x10,%rax
=> 0x00007fffc079eb55 <_ZN9lcevc_dec7decoder4PoolINS0_7DecoderEEC2Em+53> : vmovq %rax,%xmm0
0x00007fffc079eb5a <_ZN9lcevc_dec7decoder4PoolINS0_7DecoderEEC2Em+58> : vmovdqu %ymm0,(%rdi)
0x00007fffc079eb5e <_ZN9lcevc_dec7decoder4PoolINS0_7DecoderEEC2Em+62> : vpxor %xmm0,%xmm0,%xmm0
End of assembler dump.
(gdb)

This is the fisrt time I'm using GDB. If you need more information please tell me.


STEPS TO REPRODUCE
1.Open terminal
2.Run plasma-discover
or
1. Click Dicover icon

OBSERVED RESULT
On terminal: Message saying "Illegal instruction (core dumped)"
or
When clicking Dicover icon: nothing opens

EXPECTED RESULT
See the application opening the main window

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Fedora Linux 42
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.13.0
Qt Version: 6.9.0

ADDITIONAL INFORMATION