Bun segfault on Windows after long idle sessions with sleep/wake cycles

Environment

• Claude Code v2.1.77
• Bun v1.3.11 (bundled)
• Windows 11 Pro 10.0.26200
• 16.92GB RAM

Description

Two out of five concurrent Claude Code sessions crashed with Bun segfaults after being left idle for ~24 hours on Windows 11. The laptop went through multiple sleep/wake cycles during this period. Three sessions survived.

Both crashes show identical signatures — segmentation faults in KERNEL32.DLL/ntdll.dll with high memory commit (~4.5-4.8GB) and millions of page faults.

Crash Dumps

Crash 1 (Elapsed: 84520518ms, RSS: 0.92GB, Commit: 4.84GB):
Segmentation fault at address 0x5CA6C010000

Crash 2 (Elapsed: 85253911ms, RSS: 1.34GB, Commit: 4.51GB):
Segmentation fault at address 0x44924010000

Suggestions

• Consider upgrading the bundled Bun version if a fix lands upstream
• A heartbeat or watchdog mechanism could detect and gracefully recover from runtime crashes, preserving session state
• Document that long idle sessions across sleep/wake cycles on Windows may crash

Upstream

Filing corresponding issues on oven-sh/bun with the bun.report crash links.