[Bug] Upgrade Fails: Zero-Byte Executable Replaces Existing Binary

Bug Description
upgrade not working - claude seems to replace itself in folder C:\Users\[username]\.local\bin by a file with 0 bytes.

Environment Info

• Platform: win32
• Terminal: pycharm
• Version: 2.0.13
• Feedback ID: 0d9e9aaa-3c2a-43f1-801a-3b38fa97ed72

Errors

[{"error":"Error\n    at gXG (B:/~BUN/root/claude.exe:511:37285)\n    at gXG (B:/~BUN/root/claude.exe:511:37972)\n    at $e9 (B:/~BUN/root/claude.exe:512:4097)\n    at $e9 (B:/~BUN/root/claude.exe:512:4162)\n    at Ie9 (B:/~BUN/root/claude.exe:512:1612)\n    at Ie9 (B:/~BUN/root/claude.exe:512:1919)\n    at <anonymous> (B:/~BUN/root/claude.exe:513:2848)\n    at <anonymous> (B:/~BUN/root/claude.exe:513:3043)\n    at processTicksAndRejections (unknown:7:39)","timestamp":"2025-10-12T18:17:22.557Z"}]