Segmentation fault at address 0x334941E0140 oh no: Bun has crashed. This indicates a bug in Bun, not your code.

[Caio-Sc]

How can we reproduce the crash?

Use opencode copilot claude sonnet 4.5 on a big codebase. (That's all I did)

Relevant log output

Windowshell(114) spawn(97) standalone_executable transpiler_cache(4) workers_spawned(2) workers_terminated
Builtins: "bun:ffi" "bun:main" "node:assert" "node:async_hooks" "node:buffer" "node:child_process" "node:console" "node:crypto" "node:events" "node:fs" "node:fs/promises" "node:http" "node:https" "node:module" "node:net" "node:os" "node:path" "node:process" "node:readline" "node:stream" "node:string_decoder" "node:timers" "node:timers/promises" "node:tls" "node:tty" "node:url" "node:util" "undici" stdout(4) abort_signal dotenv(3) fetch(67) http_server jsc       ¯é▓
Elapsed: 255869ms | User: 8593ms | Sys: 5578ms
RSS: 0.56GB | Peak: 0.58GB | Commit: 0.76GB | Faults: 301165 | Machine: 17.07GB

Stack Trace (bun.report)

Bun v1.3.1 (89fa0f3) on windows x86_64_baseline [AutoCommand]

Segmentation fault at address 0x334941E0140

• 1 unknown/js code
• interpreter.zig:1243: deinitFromFinalizer
• ZigGeneratedClasses.zig:19903: ShellInterpreterClass__finalize
• memory:3426: std::unique_ptr<WTF::EmbeddedFixedVector<JSC::WriteBarrier<JSC::Unknown,WTF::RawValueTraits<JSC::Unknown> >,WTF::FastMalloc>,std::default_delete<WTF::EmbeddedFixedVector<JSC::WriteBarrier<JSC::Unknown,WTF::RawValueTraits<JSC::Unknown> >,WTF::FastMalloc> > >::~unique_ptr
• PreciseAllocation.h:155: JSC::PreciseAllocation::isLowerTierPrecise
• MarkedSpace.cpp:256: JSC::MarkedSpace::sweepPreciseAllocations
• memory:3461: std::unique_ptr<JSC::IsoSubspace,std::default_delete<JSC::IsoSubspace> >::operator bool
• Heap.cpp:2204: JSC::Heap::handleNeedFinalize
• Heap.cpp:2212: JSC::Heap::handleNeedFinalize
• Heap.cpp:1788: JSC::Heap::changePhase
• Heap.cpp:1412: JSC::Heap::runCurrentPhase
• Heap.cpp:2041: JSC::Heap::collectInMutatorThread::<lambda_0>::operator()
• ScopedLambda.h:58: WTF::ScopedLambda<void (...)>::operator()
• CollectingScope.h:43: JSC::CollectingScope::~CollectingScope
• Heap.cpp:2021: JSC::Heap::stopIfNecessarySlow
• LocalAllocator.cpp:129: JSC::LocalAllocator::allocateSlowCase
• LocalAllocatorInlines.h:47: JSC::LocalAllocator::allocate::<lambda_1>::operator()
• JSValue.zig:884: isEmptyOrUndefinedOrNull
• Response.zig:404: makeMaybePooled
• Strong.zig:50: create

Features: transpiler_cache, workers_spawned, workers_terminated, Bun.stderr, Bun.stdin, Bun.stdout, abort_signal, dotenv, fetch, http_server, jsc, shell, spawn, standalone_executable, standalone_executable

[github-actions]

Found 3 possible duplicate issues:

1. Segfault in ShellInterpreter finalizer during garbage collection #23177
2. SegFault running Claude Code #24357
3. Crashed during Claude Code session #24033

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
• To prevent auto-closure, add a comment or 👎 this comment

🤖 Generated with Claude Code

[nektro]

same trace as #23177 but reported version is 1.3.1 which has the fix that that issue was closed with