claude-code - 💡(How to fix) Fix [Bug] Claude 3.5 Opus regression: Logic errors in file operations and data handlingc [1 participants]

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/greg/.local/share/claude/versions/2.1.117 (expected in multi-process scenarios)\n at fn_ (/$bunfs/root/src/entrypoints/cli.js:2754:2177)\n at H98 (/$bunfs/root/src/entrypoints/cli.js:2754:1257)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-22T16:35:09.309Z"}]

TL;DR

The issue with Opus 4.7 making incorrect decisions, such as confusing credits with spends or overwriting files, may be related to a regression introduced in the new version, and checking the lock acquisition failure error could provide more insight.

Guidance

• Investigate the "Lock acquisition failed" error for /Users/greg/.local/share/claude/versions/2.1.117 to determine if it's related to the incorrect decisions made by Opus 4.7.
• Review the changes between Opus 4.6 and 4.7 to identify potential causes of the regression.
• Check if the issue persists when running Opus 4.7 in a single-process scenario to isolate the problem.
• Verify if the error occurs consistently or intermittently to help narrow down the cause.

Example

No code snippet is provided as the issue does not contain sufficient information to create a relevant example.

Notes

The provided error message suggests a potential issue with lock acquisition, which may be related to the incorrect decisions made by Opus 4.7. However, without more information about the changes between Opus 4.6 and 4.7, it's difficult to determine the root cause.

Recommendation

Apply workaround: Given the potential regression in Opus 4.7, it may be necessary to revert to Opus 4.6 or apply a workaround to mitigate the issue until a fix is available.