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[PR #1279] Revoke old event handlers correctly on pane close #24565

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opened 2026-01-31 09:04:01 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 09:04:01 +00:00
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Original Pull Request: https://github.com/microsoft/terminal/pull/1279

State: closed
Merged: Yes

Summary of the Pull Request

Fixes revoking of old close event handlers after a pane is closed (issue #1278).

References

PR Checklist

  • Closes WriteConsoleOutputWOutsideBuffer test fails occasionally (#1278)
  • CLA signed. If not, go over here and sign the CLA
  • Tests added/passed
  • Requires documentation to be updated
  • I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx

Detailed Description of the Pull Request / Additional comments

Currently, when a pane with non-leaf sibling is closed, various close event handlers are incorrectly revoked leading to dangling references. These are dereferenced next time another close event occurs (i.e. closing a 2nd pane) and causes Terminal to crash.

Additionally it revokes event handlers on old panes and controls (as occurs when a leaf pane is closed).

Validation Steps Performed

Tested manually. If I understand correctly, an automated test could be written after the framework in #1164 lands.

**Original Pull Request:** https://github.com/microsoft/terminal/pull/1279 **State:** closed **Merged:** Yes --- <!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? --> ## Summary of the Pull Request Fixes revoking of old close event handlers after a pane is closed (issue #1278). <!-- Other than the issue solved, is this relevant to any other issues/existing PRs? --> ## References <!-- Please review the items on the PR checklist before submitting--> ## PR Checklist * [x] Closes #1278 * [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA * [ ] Tests added/passed * [ ] Requires documentation to be updated * [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx <!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here --> ## Detailed Description of the Pull Request / Additional comments Currently, when a pane with non-leaf sibling is closed, various close event handlers are incorrectly revoked leading to dangling references. These are dereferenced next time another close event occurs (i.e. closing a 2nd pane) and causes Terminal to crash. Additionally it revokes event handlers on old panes and controls (as occurs when a leaf pane is closed). <!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well --> ## Validation Steps Performed Tested manually. If I understand correctly, an automated test could be written after the framework in #1164 lands.
claunia added the pull-request label 2026-01-31 09:04:01 +00:00
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Reference: starred/terminal#24565
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