LMMS / LMMS/lmms

Crash when deleting a Vestige track while the controller window is open

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bug
Dominant language
C++
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Description

### System Information

Windows 11 25H2

### LMMS Version(s)

1.3.0-alpha.2.5+3d97b11

### Most Recent Working Version

_No response_

### Bug Summary

When removing a Vestige track while the controller window is open, LMMS crashes.

### Expected Behaviour

It should not crash.

### Steps To Reproduce

1) Add a Vestige track
2) Load any VST (such as OB-Xd)
3) Open the controller window
4) Delete the track

### Logs

_No response_

### Screenshots / Minimum Reproducible Project

### Please search the issue tracker for existing bug reports before submitting your own.

- [x] I have searched all existing issues and confirmed that this is not a duplicate.

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

First reproduce the crash in LMMS using the listed Vestige track, loaded VST, open controller window, and track deletion steps. Trace the Vestige track and controller-window teardown path; done means deleting the track while the controller window is open no longer crashes on Windows 11.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
desktop
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Mostly clear
Newbie friendliness
55/100

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