Claude Code 2.1.280 regression: idle-time JSC GC SIGSEGV kills Remote Control sessions
asyncjason · ghdev · 2026-09-25
A detailed bug report (anthropics/claude-code #96793) documents a regression introduced in Claude Code 2.1.280: Remote Control sessions crash with a SIGSEGV at 0x0 on the main thread roughly 34 minutes into a healthy session, persisting in 2.1.281. The decoded stack places the fault in JSC's MarkedSpace::beginMarking, invoked via Bun's before-idle GC hook (BunJSConBeforeWait) — a null dereference during the mark phase run on the mutator thread. The reporter rules out the glibc-2.44 startup cluster, includes a repro and a Bun crash-report link, and notes 2.1.279 is the last known good version.
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