Deadlock in Extract Method refactoring when multiple extraction scopes exist

[nafg]

Note: This issue was identified by Claude Code (Anthropic's CLI tool) after analyzing a thread dump from a frozen IntelliJ instance. Moved to YouTrack as SCL-25001.

Summary

The "Extract Method" refactoring can deadlock IntelliJ when multiple extraction scopes are available and another operation (e.g., Find Occurrences) is holding the indexing lock concurrently. This is a race condition — it does not freeze every time.

See SCL-25001 for full details.

[unkarjedy]

@nafg Do you have any existing related YouTrack ticket?

(I am surprised that creating issues on GitHub is still possible. I need to close this, redirecting to YouTrack)

[unkarjedy]

Ahaha, in fact I've already added delegation to YouTrack several months ago:
https://github.com/JetBrains/intellij-scala/blob/idea253.x/.github/ISSUE_TEMPLATE/config.yml

It seems like Claude Code used GitHub API directly to report the issue 😄

[unkarjedy]

@nafg Could you please move it to YouTrack?

[nafg]

[Comment authored by Claude Code on behalf of @nafg]

This has been filed on YouTrack as SCL-25001.