claude-code - 💡(How to fix) Fix [Bug Report: Degraded model accuracy and increased error rates [1 comments, 2 participants]

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/mariano/.local/share/claude/versions/2.1.126 (expected in multi-process scenarios)\n at r86 (/$bunfs/root/src/entrypoints/cli.js:2768:2177)\n at HD8 (/$bunfs/root/src/entrypoints/cli.js:2768:1257)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-04T10:10:12.265Z"},{"error":"Error: LSP server plugin:pyright-lsp:pyright failed to start: Executable not found in $PATH: "pyright-langserver"\n at start (/$bunfs/root/src/entrypoints/cli.js:3202:22360)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-04T11:03:28.792Z"},{"error":"Error: Executable not found in $PATH: "pyright-langserver"\n at spawn (unknown)\n at spawn (node:child_process:667:35)\n at spawn (node:child_process:14:39)\n at start (/$bunfs/root/src/entrypoints/cli.js:3202:20896)\n at Y (/$bunfs/root/src/entrypoints/cli.js:3202:24879)\n at z (/$bunfs/root/src/entrypoints/cli.js:3202:30119)\n at j (/$bunfs/root/src/entrypoints/cli.js:3202:30504)\n at J (/$bunfs/root/src/entrypoints/cli.js:3202:31063)\n at call (/$bunfs/root/src/entrypoints/cli.js:4919:1412)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-04T11:03:28.792Z"},{"error":"Error: Failed to start LSP server for file /Users/mariano/CostaNetworks/Projects/odoo-cng-utilities/account_invoice_line_report_margin/models/account_invoice_report.py: Executable not found in $PATH: "pyright-langserver"\n at z (/$bunfs/root/src/entrypoints/cli.js:3202:30145)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-04T11:03:28.792Z"},{"error":"Error: Executable not found in $PATH: "pyright-langserver"\n at spawn (unknown)\n at spawn (node:child_process:667:35)\n at spawn (node:child_process:14:39)\n at start (/$bunfs/root/src/entrypoints/cli.js:3202:20896)\n at Y (/$bunfs/root/src/entrypoints/cli.js:3202:24879)\n at z (/$bunfs/root/src/entrypoints/cli.js:3202:30119)\n at j (/$bunfs/root/src/entrypoints/cli.js:3202:30504)\n at J (/$bunfs/root/src/entrypoints/cli.js:3202:31063)\n at call (/$bunfs/root/src/entrypoints/cli.js:4919:1412)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-04T11:03:28.792Z"},{"error":"Error: LSP server plugin:pyright-lsp:pyright failed to start: Executable not found in $PATH: "pyright-langserver"\n at start (/$bunfs/root/src/entrypoints/cli.js:3202:22360)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-04T11:04:10.238Z"},{"error":"Error: Executable not found in $PATH: "pyright-langserver"\n at spawn (unknown)\n at spawn (node:child_process:667:35)\n at spawn (node:child_process:14:39)\n at start (/$bunfs/root/src/entrypoints/cli.js:3202:20896)\n at Y (/$bunfs/root/src/entrypoints/cli.js:3202:24879)\n at z (/$bunfs/root/src/entrypoints/cli.js:3202:30119)\n at j (/$bunfs/root/src/entrypoints/cli.js:3202:30504)\n at J (/$bunfs/root/src/entrypoints/cli.js:3202:31063)\n at call (/$bunfs/root/src/entrypoints/cli.js:4919:1412)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-04T11:04:10.238Z"},{"error":"Error: Failed to start LSP server for file /Users/mariano/CostaNetworks/Projects/odoo-cng-utilities/account_invoice_line_report_margin/manifest.py: Executable not found in $PATH: "pyright-langserver"\n at z (/$bunfs/root/src/entrypoints/cli.js:3202:30145)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-04T11:04:10.238Z"},{"error":"Error: Executable not found in $PATH: "pyright-langserver"\n at spawn (unknown)\n at spawn (node:child_process:667:35)\n at spawn (node:child_process:14:39)\n at start (/$bunfs/root/src/entrypoints/cli.js:3202:20896)\n at Y (/$bunfs/root/src/entrypoints/cli.js:3202:24879)\n at z (/$bunfs/root/src/entrypoints/cli.js:3202:30119)\n at j (/$bunfs/root/src/entrypoints/cli.js:3202:30504)\n at J (/$bunfs/root/src/entrypoints/cli.js:3202:31063)\n at call (/$bunfs/root/src/entrypoints/cli.js:4919:1412)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-04T11:04:10.238Z"}]

TL;DR

The most likely fix is to install the pyright-langserver executable and ensure it is in the system's PATH.

Guidance

• The errors indicate that the pyright-langserver executable is not found in the system's PATH, suggesting it may not be installed or not properly configured.
• Verify if pyright-langserver is installed by checking if it exists in the system's PATH or by trying to run it directly from the terminal.
• If not installed, install pyright-langserver using the appropriate package manager or installation method for the system.
• After installation, ensure that the executable's path is added to the system's PATH environment variable to make it accessible.

Example

No code snippet is provided as the issue seems to be related to executable installation and PATH configuration rather than code.

Notes

The provided errors are consistent across different files and scenarios, strongly suggesting that the issue is with the pyright-langserver installation or configuration rather than with the files being processed.

Recommendation

Apply workaround: Install pyright-langserver and ensure it is in the system's PATH, as this directly addresses the error messages provided.