Bun segfault during extended multi-agent workflow (Windows)

Environment

• Claude Code CLI on Windows 11 x64
• Embedded Bun: 1.3.5 (latest stable: 1.3.8)
• CPU: i9-14900HX (sse42, avx, avx2)
• RAM: 192GB

What happened

Running an extended multi-agent workflow (~7 minutes elapsed). Bun segfaulted with no warning. Process was using claude -c --dangerously-skip-permissions.

Crash data

Elapsed: 440650ms | User: 42390ms | Sys: 9109ms
RSS: 1.06GB | Peak: 1.67GB | Commit: 1.22GB | Faults: 3386742

panic(main thread): Segmentation fault at address 0xFFFFFFFFFFFFFFFE

Bun crash report

https://bun.report/1.3.5/e_11e86cebmgEuhogC43s/wB84pi3B__________________A2DF

Frequency

Intermittent. Occurs during extended sessions with multi-agent spawning (Task tool). Multiple crashes observed across sessions.

Note

Embedded Bun version (1.3.5) is 3 versions behind latest (1.3.8). Fix may already exist upstream.

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This comment was written by Claude (Opus 4.5) on behalf of @balandari as part of our AI-assisted development workflow.