[BUG] SIGKILL on older CPU

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?

CPU: Intel Pentium P6200 (no AVX support)
Was working, broke with 2.1.114 auto-update
SIGILL error on the native binary

What Should Happen?

Claude should work with no SIGKILL

Error Messages/Logs

026-04-19 19:49:16.644 [info] Getting authentication status
2026-04-19 19:49:16.644 [info] OAuth tokens found in secure storage
2026-04-19 19:49:17.132 [error] claude auth status parse failed: SyntaxError: Unexpected end of JSON input
2026-04-19 19:49:17.136 [info] Received message from webview: {"type":"request","requestId":"bepowjeaax","request":{"type":"get_claude_state"}}
2026-04-19 19:49:17.138 [info] Received message from webview: {"type":"request","requestId":"w6g1igg9hbl","request":{"type":"get_current_selection"}}
2026-04-19 19:49:17.138 [info] Received message from webview: {"type":"request","requestId":"i7zyxlvd72k","request":{"type":"get_asset_uris"}}
2026-04-19 19:49:17.143 [info] Received message from webview: {"type":"request","requestId":"7ousr4329sw","request":{"type":"list_sessions_request"}}
2026-04-19 19:49:17.146 [info] Received message from webview: {"type":"request","requestId":"q5johw9gp3","request":{"type":"rename_tab","title":"Claude Code","hasPendingPermissions":false,"hasUnseenCompletion":false}}
2026-04-19 19:49:17.427 [info] Received message from webview: {"type":"request","requestId":"ajevh4zzzbe","request":{"type":"rename_tab","title":"Claude Code","hasPendingPermissions":false,"hasUnseenCompletion":false}}
2026-04-19 19:49:17.428 [info] Received message from webview: {"type":"launch_claude","channelId":"bhjztb7zonq","cwd":"/home/j/Documents/CryptoBot","permissionMode":"default","thinkingLevel":"default_on"}
2026-04-19 19:49:17.466 [info] Launching Claude on channel: bhjztb7zonq
2026-04-19 19:49:27.759 [info] Python env: PATH=/usr/bin:/home/j/.local/bin:/home/j/.local/bin:/home/j/.nvm/versions/node/v24.15.0/bin:/home/j/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
2026-04-19 19:49:27.759 [info] Python env: VIRTUAL_ENV=/usr
2026-04-19 19:49:27.760 [info] Spawning Claude with SDK query function - cwd: /home/j/Documents/CryptoBot, permission mode: default, version: 2.1.109, /home/j/.vscode/extensions/anthropic.claude-code-2.1.109-linux-x64/resources/native-binary/claude, resume: undefined
2026-04-19 19:49:28.049 [info] Closing Claude on channel: bhjztb7zonq
2026-04-19 19:49:28.051 [error] Error spawning Claude (on channel bhjztb7zonq): Error: Claude Code process terminated by signal SIGILL
2026-04-19 19:49:28.053 [error] Failed to load config cache: Error: Claude Code process terminated by signal SIGILL
2026-04-19 19:49:28.057 [error] Error processing client request: Error: Claude Code process terminated by signal SIGILL
2026-04-19 19:49:28.257 [info] Received message from webview: {"type":"interrupt_claude","channelId":"bepowjeaax"}
2026-04-19 19:49:28.271 [warning] Channel not found: bepowjeaax
2026-04-19 19:49:30.308 [info] Received message from webview: {"type":"request","requestId":"tlmytwcvtgj","request":{"type":"open_output_panel"}}

Steps to Reproduce

installed extension in visual code a couple of weeks ago, it did work and something updated in the last few days

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.114

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_