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A composition that ends in the same task as an Enter keydown was sent twice. The keydown settled the pending edit (sending the composed word and setting _dataAlreadySent), then xterm's own keydown finalized the composition synchronously through _finalizeComposition(false), which ignores _dataAlreadySent and sent the word again. settleEdit() now takes the keydown event and, while xterm has a composition in flight (_isSendingComposition), leaves the text to xterm for any key that makes it finalize synchronously. On 229, CapsLock and the modifiers xterm keeps the composition on its async path, which honours _dataAlreadySent, so the edit still applies there. The waiting timers are cleared before that early return, so a timer cannot fire after Enter's textarea clear and send a run of DELs. The guard sits in settleEdit(), not in applyEdit() as the bot proposed. In applyEdit() it would also silence the timer path, where xterm always finalizes asynchronously and skips _dataAlreadySent, so a non-composing character typed just before a composition (the x in xword) would be lost where master and the PR head both deliver it. Two unit tests pin it, both measured: one fails without the guard (the Enter keydown sends 'ab word' instead of 'ab '), and one fails with the guard moved into applyEdit() (the timer path sends 'ab ' instead of 'ab xword'; a 229 settle must also still send the edit). The xterm private-API guard test now also checks the bundle still ships _isSendingComposition, and names it in its failure message and comment. CLAUDE.md: the surviving #441 sentence said a keydown decides before xterm's 229 rescue has run and that Enter's clear makes the pending diff emit nothing. Neither holds any more (the edit diff is settled first, and master already sent one DEL there), so it now says the edit diff is settled first at that keydown. The PR's sentence notes the composition exception. The PR's own changeset is removed; its text goes into the single combined release changeset. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Changesets
Hello and welcome! This folder has been automatically generated by @changesets/cli, a build tool that works
with multi-package repos, or single-package repos to help you version and publish your code. You can find
the full documentation for it in the repository.
What is a changeset?
A changeset is a piece of information about changes made in a branch or commit. It holds three bits of information:
- What packages need to be released
- What semver bump type each package should receive (major / minor / patch)
- A summary of the changes
How do I create a changeset?
Run npx changeset or create a .md file in this directory with the following format:
---
"codeman": patch
---
Description of changes
The frontmatter specifies which package(s) to bump and the bump type. The body is the changelog entry.