Crash in js::jit::BacktrackingAllocator::tryMergeReusedRegister(js::jit::VirtualRegister&, js::jit::VirtualRegister&)

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An owning problem doesn't exist yet.
Component
firefox
Last affected version
0:119.0-2.fc39
Executable
/usr/lib64/firefox/firefox
Error name
SIGSEGV 11
First occurrence
2026-09-27
Last occurrence
2026-09-27
Unique reports
1
Quality
-18

Statistics

Operating system Unique / Total count
Fedora 39 1 / 1
Operating system Count
Fedora 39 1
Architecture Count
x86_64 1
Related packages Count
firefox 1
 0:119.0-2.fc39 1

Packages names with count less than the total count of reports are most probably not the cause of the problem.

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No reports in the last 20 days.


Backtrace

Frame # Function Binary Source or offset Line
1
js::jit::BacktrackingAllocator::tryMergeReusedRegister(js::jit::VirtualRegister&, js::jit::VirtualRegister&)
/usr/lib64/firefox/libxul.so 0x2bf28d9
Build id: 7312578303ad095d7c430bf9a6c52947b730fc91 		-
2
js::jit::GenerateLIR(js::jit::MIRGenerator*)
/usr/lib64/firefox/libxul.so 0x272f550
Build id: 7312578303ad095d7c430bf9a6c52947b730fc91 		-
3
js::wasm::IonCompileFunctions(js::wasm::ModuleEnvironment const&, js::wasm::CompilerEnvironment const&, js::LifoAlloc&, mozilla::Vector<js::wasm::FuncCompileInput, 8ul, js::SystemAllocPolicy> const&, js::wasm::CompiledCode*, mozilla::UniquePtr<char [], JS::FreePolicy>*) [clone .isra.0] [clone .cold]
/usr/lib64/firefox/libxul.so 0x237e971
Build id: 7312578303ad095d7c430bf9a6c52947b730fc91 		-
4
ExecuteCompileTask(js::wasm::CompileTask*, mozilla::UniquePtr<char [], JS::FreePolicy>*) [clone .lto_priv.0]
/usr/lib64/firefox/libxul.so 0x30ca62d
Build id: 7312578303ad095d7c430bf9a6c52947b730fc91 		-
5
js::wasm::CompileTask::runHelperThreadTask(js::AutoLockHelperThreadState&)
/usr/lib64/firefox/libxul.so 0x2185e0e
Build id: 7312578303ad095d7c430bf9a6c52947b730fc91 		-
6
mozilla::ThreadFuncPoolThread(void*)
/usr/lib64/firefox/libxul.so 0x2ad08e9
Build id: 7312578303ad095d7c430bf9a6c52947b730fc91 		-
7
_pt_root
/lib64/libnspr4.so 0x2d749
Build id: cc5fa6437d80af37c6ebd773913b0c653782352d 		-
8
start_thread
/lib64/libc.so.6 0x8e907
Build id: 1cd2d1016ef987f11f5709c2aa0deb4520dcc851 		-
9
__clone
/lib64/libc.so.6 0x115944
Build id: 1cd2d1016ef987f11f5709c2aa0deb4520dcc851 		-