[BUG] Claude Code process exited with code 3 when I try any input.

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Anytime I ask claude anything in my ide, it exits with code 3. This happened right as it finished a lot of work. Here's the link it told me to give you in the logs:
https://bun.report/1.3.5/e_11e86cebGugogCw+kiM65ioJgqpmMCYKERNEL32.DLLut0LCSntdll.dll4zijBA0eNoFwcENACAMAsBVWM1ENHyosXzc3js53LyYxYYrWApkTHbkEZWRd/gBNAAPKQ

What Should Happen?

Claude should be working

Error Messages/Logs

2026-01-18 01:11:55.755 [info] From claude: ============================================================

2026-01-18 01:11:55.755 [info] From claude: Bun v1.3.5 (1e86cebd) Windows x64 (baseline)

2026-01-18 01:11:55.755 [info] From claude: Windows v
2026-01-18 01:11:55.756 [info] From claude: .win11_dt
CPU: sse42 avx avx2
Args: "c:\Users\Dovid\.vscode\extensions\anthropic.claude-code-2.1.11-win32-x64\resources\native-binary\claude.exe" "--output-format" "stream-json" "--verbose" "--input-format" "stream-json" "--max-thinking-tokens" "0" "--model"...
Features: Bun.stderr(
2026-01-18 01:11:55.756 [info] From claude: 2) Bun.stdin(2) Bun.stdout(2) fetch(6) jsc spawn(8) standalone_executable 
Builtins: "bun:main" "node:assert" "node:async_hooks" "node:buffer" "node:child_process" "node:constants" "node:crypto" "node:domain" "node:events" "node:fs" "node:fs/promises" "node:http" "node:https" "node:module" "node:net" "node:os" "node:path" "node:path/posix" "node:path/win32" "node:perf_hooks" "node:process" "node:querystring" "node:stream" "node:timers/promises" "node:tls" "node:tty" "node:url" "node:util" "node:zlib" "node:worker_threads" "undici" "ws" "node-fetch" "node:inspector" "node:http2" "node:diagnostics_channel" 

2026-01-18 01:11:55.756 [info] From claude: Elapsed: 3922ms | User: 1140ms | Sys: 2687ms
RSS: 
2026-01-18 01:11:55.757 [info] From claude: 6.63GB | Peak: 6.63GB | Commit: 6.71GB | Faults: 1627842 | Machine: 17.06GB

panic(thread 40460): integer does not fit in destination type

2026-01-18 01:11:55.757 [info] From claude: oh no: Bun has crashed. This indicates a bug in Bun, not your code.

To send a redacted crash report to Bun's team,
please file a GitHub issue using the link below:

 
2026-01-18 01:11:55.758 [info] From claude: https://bun.report/1.3.5/e_11e86cebGugogCw+kiM65ioJgqpmMCYKERNEL32.DLLut0LCSntdll.dll4zijBA0eNoFwcENACAMAsBVWM1ENHyosXzc3js53LyYxYYrWApkTHbkEZWRd/gBNAAPKQ


2026-01-18 01:11:58.622 [info] Closing Claude on channel: hiepv7orl8c
2026-01-18 01:11:58.623 [error] Error from Claude (on channel hiepv7orl8c): Error: Claude Code process exited with code 3

Steps to Reproduce

Ask claude anything

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

nothing works, claude --version runs forever and the error banner is displayed

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_