helix: Fix paste crash (#58373) (cherry-pick to preview)#58415
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Closes [#58343](<#58343>) This crash happened because Helix paste restored selection using the raw clipboard text length, but buffer edits normalize CRLF line endings to LF before inserting. When pasting CRLF text at or near EOF, the restored selection could extend past the normalized snapshot length and panic in `MutableSelectionsCollection::select_ranges`. The fix normalizes the text before measuring it for selection restoration and adds regression coverage for CRLF paste in Helix mode. Self-Review Checklist: - [X] I've reviewed my own diff for quality, security, and reliability - [X] Unsafe blocks (if any) have justifying comments - [X] The content is consistent with the [UI/UX checklist](<https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist>) - [X] Tests cover the new/changed behavior - [X] Performance impact has been considered and is acceptable Release Notes: - Fixed a crash that could occur when pasting at the end of a file in Helix mode
Anthony-Eid
approved these changes
Jun 3, 2026
This was referenced Jun 3, 2026
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Cherry-pick of #58373 to preview
Closes #58343
This crash happened because Helix paste restored selection using the raw
clipboard text length, but buffer edits normalize CRLF line endings to
LF before inserting. When pasting CRLF text at or near EOF, the restored
selection could extend past the normalized snapshot length and panic in
MutableSelectionsCollection::select_ranges. The fix normalizes thetext before measuring it for selection restoration and adds regression
coverage for CRLF paste in Helix mode.
Self-Review Checklist:
checklist
Release Notes:
Helix mode