Recurring Bun crash on Windows ARM64 (Parallels) — panic: incorrect alignment

Bug Report

Environment

• Claude Code extension: v2.1.49 (VSCode)
• OS: Windows 11 Home (Build 26200), ARM64 via Parallels
• Bun: v1.3.10 (bundled with extension)
• Architecture: win32-arm64

Description

Claude Code repeatedly crashes with a Bun runtime panic during session startup. The crash kills the active Claude process, requiring a manual restart of the panel.

This is intermittent but frequent enough to disrupt normal usage.

Crash output from extension log

Bun v1.3.10 (1423d3c8) Windows arm64
CPU: neon fp aes crc32 atomics

panic(thread 18188): incorrect alignment

oh no: Bun has crashed. This indicates a bug in Bun, not your code.

Exit code: 3

Bun crash report link: https://bun.report/1.3.10/W_11423d3cmgEugogCwmzrfwl0uiBgyvBw32CwmvBo7xB44wCwvhgmCw236lC4i16lCg6xjkBgsjufCYKERNEL32.DLLg0jCCSntdll.dlloqi1BA0eNrLzEvOLypKTS5RSMzJTM/LTc0rAQBMcwep

Steps to Reproduce

1. Open VSCode with Claude Code extension on Windows ARM64 (Parallels on Apple Silicon)
2. Open the Claude Code panel
3. Start or resume a session
4. Process crashes intermittently during startup

Additional context

The extension spawns two Claude processes at startup (config cache + active session). The crash appears to affect one or both processes. When it hits the active session channel, Claude Code becomes unresponsive and must be restarted.