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Description of problem: Whilst capturing a screencast for https://bugzilla.mozilla.org/show_bug.cgi?id=1985672#c1, this trace appeared. I'm surprised that it differs to https://bugzilla.redhat.com/show_bug.cgi?id=2390798#c0. Version-Release number of selected component: firefox-142.0-1.fc42 Additional info: reporter: libreport-2.17.15 type: CCpp reason: firefox killed by SIGSEGV journald_cursor: s=a2d6d580caa24cf3a9483be7f85033e4;i=27ebf8;b=c6e7976306c548958460fc9148f93a9e;m=e5b45273;t=63d6ccedef2e4;x=8d62ee986c67c00c executable: /usr/lib64/firefox/firefox cmdline: $'/usr/lib64/firefox/firefox -contentproc -isForBrowser -prefsHandle 0:38033 -prefMapHandle 1:281193 -safeMode -parentBuildID 20250818081258 -sandboxReporter 2 -chrootClient 3 -ipcHandle 4 -initialChannelId {cdf2e125-21bb-4006-815c-767a75a4877a} -parentPid 20892 -crashReporter 5 -crashHelper 6 -greomni /usr/lib64/firefox/omni.ja -appomni /usr/lib64/firefox/browser/omni.ja -appDir /usr/lib64/firefox/browser 12 tab' cgroup: 0::/user.slice/user-1000.slice/user/app.slice/app-org.kde.konsole rootdir: /proc/21458/fdinfo uid: 1000 mountinfo: kernel: 6.15.10-200.fc42.x86_64 package: firefox-142.0-1.fc42 runlevel: N 5 dso_list: /usr/lib64/firefox/firefox firefox-142.0-1.fc42.x86_64 (Fedora Project) 1755820720 backtrace_rating: 4 crash_function: js::wasm::ProfilingFrameIterator::initFromExitFP comment: Whilst capturing a screencast for https://bugzilla.mozilla.org/show_bug.cgi?id=1985672#c1, this trace appeared. I'm surprised that it differs to https://bugzilla.redhat.com/show_bug.cgi?id=2390798#c0. Truncated backtrace: Thread no. 0 (12 frames) #0 js::wasm::ProfilingFrameIterator::initFromExitFP at /usr/src/debug/firefox-142.0-1.fc42.x86_64/js/src/wasm/WasmFrameIter.cpp:1183 #1 js::wasm::ProfilingFrameIterator::ProfilingFrameIterator at /usr/src/debug/firefox-142.0-1.fc42.x86_64/js/src/wasm/WasmFrameIter.cpp:1644 #2 JS::ProfilingFrameIterator::iteratorConstruct at /usr/src/debug/firefox-142.0-1.fc42.x86_64/js/src/vm/Stack.cpp:565 #3 JS::ProfilingFrameIterator::ProfilingFrameIterator at /usr/src/debug/firefox-142.0-1.fc42.x86_64/js/src/vm/Stack.cpp:489 #4 ExtractJsFrames at /usr/src/debug/firefox-142.0-1.fc42.x86_64/tools/profiler/core/platform.cpp:2244 #5 DoSharedSample at /usr/src/debug/firefox-142.0-1.fc42.x86_64/tools/profiler/core/platform.cpp:2995 #6 DoPeriodicSample at /usr/src/debug/firefox-142.0-1.fc42.x86_64/tools/profiler/core/platform.cpp:3072 #7 operator() at /usr/src/debug/firefox-142.0-1.fc42.x86_64/tools/profiler/core/platform.cpp:4841 #8 SuspendAndSampleAndResumeThread<SamplerThread::Run()::<lambda(const Registers&, const mozilla::TimeStamp&)> > at /usr/src/debug/firefox-142.0-1.fc42.x86_64/tools/profiler/core/platform-linux-android.cpp:467 #9 SamplerThread::Run at /usr/src/debug/firefox-142.0-1.fc42.x86_64/tools/profiler/core/platform.cpp:4838 #10 ThreadEntry at /usr/src/debug/firefox-142.0-1.fc42.x86_64/tools/profiler/core/platform-linux-android.cpp:506 #11 set_alt_signal_stack_and_start at /usr/src/debug/firefox-142.0-1.fc42.x86_64/mozglue/interposers/pthread_create_interposer.cpp:81 Potential duplicate: bug 2326841
Created attachment 2105110 [details] File: proc_pid_status
Created attachment 2105111 [details] File: maps
Created attachment 2105112 [details] File: limits
Created attachment 2105113 [details] File: environ
Created attachment 2105114 [details] File: open_fds
Created attachment 2105115 [details] File: os_info
Created attachment 2105116 [details] File: cpuinfo
Created attachment 2105117 [details] File: core_backtrace
Created attachment 2105118 [details] File: exploitable
Created attachment 2105119 [details] File: backtrace
https://bugzilla.mozilla.org/show_bug.cgi?id=1977103#c6 may indicate that this UPSTREAM, since it reproduced at https://bugzilla.redhat.com/show_bug.cgi?id=2411722#c13.
I don't recall why I NEEDSINFO'd myself, any more: perhaps, I knew how to determine https://bugzilla.redhat.com/show_bug.cgi?id=2391475#c11 once. I don't now.
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As https://bugzilla.mozilla.org/show_bug.cgi?id=1985672#c12 demonstrates, this continues to reproduce.