LMMS / LMMS/lmms

VST crashes LMMS on removal

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bug
Dominant language
C++
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Description

### System Information

Opensuse Tumbleweed, KDE Plasma 6.7.5

### LMMS Version(s)

1.3.0-Alpha 2 Appimage

### Most Recent Working Version

_No response_

### Bug Summary

When removing a VST2 plugin from a track, if the settings dialog is open for it then it crashes the program.

### Expected Behaviour

The VST2 should be removed without incident.

### Steps To Reproduce

Add a VST2 effect to a track
Open the setting dialog the effect
Remove the VST2 effect.

### Logs

Click to expand

  

### Screenshots / Minimum Reproducible Project

https://github.com/user-attachments/assets/a8c164f9-e635-4e79-b3d5-85f59a6f2b90

### 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

Reproduce the crash by adding a VST2 effect, opening its settings dialog, and removing the effect while the dialog remains open. Trace the effect-removal and settings-dialog lifecycle, then verify that removal completes without crashing in the same scenario.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
desktop
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Active
Clarity
Clearly specified
Newbie friendliness
55/100

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