Seeing huge hang ups, memory leaks and missing chats right after upgrading to 2.3.40

[Hensley (Brian)]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I’m using cursor IDE just fine for months… then today my chat is gone (says its too long and hidden now in a txt file), and i’m having it try to run a script and it keep sitting there over and over. I’ve reset the app, still happens. So I open the menu to see what happening and looks like a leak, memory issues.. can someone help me? I had AI summarize the loooong errror log:

Bug Report: Critical Database Corruption & Memory Leaks in v2.4.30

Version: 2.4.30 (stable channel)
Platform: Windows x64
Impact: Composer/Agent completely unusable

Key Errors:

Database Corruption:
[DiffHashTracker] Error tracking NAL edit: Error: SQLITE_ERROR: cannot start a transaction within a transaction
[AiCodeTracking] Error processing files after shell call: Error: SQLITE_ERROR: cannot start a transaction within a transaction
Composer Timeouts:
[composer] No first token received within 2s/4s/6s/8s/10s/12s/14s/16s/32s
requestId: b5f927ee-b367-4f35-80a8-a7cbd4151434
Stream Errors:
ERR WritableIterable is closed: WriteIterableClosedError
[composer] Client stream abort Error: submit_chat_abort_existing
[transport] Agent client stream abort Error: conversation_action_abort
Memory Leaks:
[003] potential listener LEAK detected, having 400/600/800/1000/1200/1596/1996/2196 listeners already
[002] potential listener LEAK detected, having 200/300/400/544/644/744/844/942/1042/1142/1242/1342/1442/1534 listeners already
Diff Computation Failures:
[composer] Diff computation timed out for XYZ-database.php. File has 938 original lines and 1032 new lines. Treating entire file as changed.
UI Crashes:
SOMETHING WENT WRONG!!! (2)
[ExtensionService] No inspect port found for LocalProcess
Reproduction: Occurs when using Composer with multiple file edits. Errors cascade rapidly, making the tool completely unusable. Database transaction errors prevent tracking of any code changes.

Expected: Composer should process requests without database errors or memory leaks.

Steps to Reproduce

Using the chat to do normal tasks… build a ZIP file was the last thing I had it doing.

Expected Behavior

Not hang

Operating System

Windows 10/11

Version Information

Version: 2.4.30 (system setup)
VSCode Version: 1.105.1
Commit: 0f8217a84adf66daf250228a3ebf0da631d3c9b0
Date: 2026-02-06T23:20:57.191Z
Build Type: Stable
Release Track: Early Access
Electron: 39.2.7
Chromium: 142.0.7444.235
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

Opus 4.6

Does this stop you from using Cursor

Yes - Cursor is unusable

[deanrie]

Hey, thanks for the report.

This looks like an SQLite concurrency bug we’re already tracking. Transaction errors can cascade and break other features.

Try resetting the corrupted state (make a backup first):

1. Fully close Cursor
2. Delete %APPDATA%\Cursor\User\workspaceStorage
3. Restart Cursor

If that doesn’t help, also delete %APPDATA%\Cursor\User\globalStorage (or do a full reinstall).

Also check extensions: CTRL + Shift + P > Developer: Open Extension Monitor. Or run cursor --disable-extensions from the command line to rule them out.

A couple of questions:

• How big is the project (roughly how many files)?
• Did you have a lot of files open when the issue started?

The team is aware of this bug. Let me know how it goes after the cleanup.

[Jie_Li]

How about the mac user? How can I recover from this.