agent: Fix a UTF-8 boundary panic in the agent streaming parser - #58432
Merged
Anthony-Eid merged 1 commit intoJun 3, 2026
Merged
Conversation
The parser stores emitted byte offsets between partial tool-call parses. Because partial JSON can be repaired differently as more bytes arrive, a byte offset that was valid in an earlier string can land inside a multibyte character in a later string. We now normalize those offsets with `find_char_boundary` before slicing. Added property tests covering boundary-sensitive write/edit streaming sequences to prevent regressions. Fixes Sentry ZED-8Y1 / 7523469866. Release Notes: - Fixed a crash that could occur while streaming agent edits containing multibyte characters.
cla-bot
Bot
added
the
cla-signed
zed-community-bot
Bot
added
the
staff
maxdeviant
changed the title
bennetbo
approved these changes
Jun 3, 2026
Anthony-Eid
deleted the
anthony/fr-56-zed-8y1-start-byte-index-7811-is-not-a-char-boundary-it-is
branch
June 3, 2026 15:51
Contributor
Author
|
/cherry-pick preview |
zed-zippy Bot
added a commit
that referenced
this pull request
Jun 3, 2026
…) (cherry-pick to preview) (#58451) Cherry-pick of #58432 to preview ---- The parser stores emitted byte offsets between partial tool-call parses. Because partial JSON can be repaired differently as more bytes arrive, a byte offset that was valid in an earlier string can land inside a multibyte character in a later string. We now normalize those offsets with `find_char_boundary` before slicing. Added property tests covering boundary-sensitive write/edit streaming sequences to prevent regressions. Fixes Sentry ZED-8Y1 / 7523469866. 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 while streaming agent edits containing multibyte characters. Co-authored-by: Anthony Eid <56899983+Anthony-Eid@users.noreply.github.com>
zed-zippy Bot
added a commit
that referenced
this pull request
Jun 3, 2026
…) (cherry-pick to stable) (#58452) Cherry-pick of #58432 to stable ---- The parser stores emitted byte offsets between partial tool-call parses. Because partial JSON can be repaired differently as more bytes arrive, a byte offset that was valid in an earlier string can land inside a multibyte character in a later string. We now normalize those offsets with `find_char_boundary` before slicing. Added property tests covering boundary-sensitive write/edit streaming sequences to prevent regressions. Fixes Sentry ZED-8Y1 / 7523469866. 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 while streaming agent edits containing multibyte characters. Co-authored-by: Anthony Eid <56899983+Anthony-Eid@users.noreply.github.com>
TomPlanche
pushed a commit
to TomPlanche/zed
that referenced
this pull request
Jun 8, 2026
…industries#58432) The parser stores emitted byte offsets between partial tool-call parses. Because partial JSON can be repaired differently as more bytes arrive, a byte offset that was valid in an earlier string can land inside a multibyte character in a later string. We now normalize those offsets with `find_char_boundary` before slicing. Added property tests covering boundary-sensitive write/edit streaming sequences to prevent regressions. Fixes Sentry ZED-8Y1 / 7523469866. 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 while streaming agent edits containing multibyte characters.
This was referenced Jun 10, 2026
This was referenced Jun 18, 2026
Closed
liusuren123
pushed a commit
to liusuren123/zed
that referenced
this pull request
Jun 24, 2026
…industries#58432) (cherry-pick to preview) (zed-industries#58451) Cherry-pick of zed-industries#58432 to preview ---- The parser stores emitted byte offsets between partial tool-call parses. Because partial JSON can be repaired differently as more bytes arrive, a byte offset that was valid in an earlier string can land inside a multibyte character in a later string. We now normalize those offsets with `find_char_boundary` before slicing. Added property tests covering boundary-sensitive write/edit streaming sequences to prevent regressions. Fixes Sentry ZED-8Y1 / 7523469866. 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 while streaming agent edits containing multibyte characters. Co-authored-by: Anthony Eid <56899983+Anthony-Eid@users.noreply.github.com>
This was referenced Jul 1, 2026
This was referenced Jul 10, 2026
jonx
pushed a commit
to jonx/zed-aros
that referenced
this pull request
Jul 17, 2026
…industries#58432) The parser stores emitted byte offsets between partial tool-call parses. Because partial JSON can be repaired differently as more bytes arrive, a byte offset that was valid in an earlier string can land inside a multibyte character in a later string. We now normalize those offsets with `find_char_boundary` before slicing. Added property tests covering boundary-sensitive write/edit streaming sequences to prevent regressions. Fixes Sentry ZED-8Y1 / 7523469866. 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 while streaming agent edits containing multibyte characters.
jolutz
pushed a commit
to jolutz/zed
that referenced
this pull request
Aug 8, 2026
…industries#58432) (cherry-pick to preview) (zed-industries#58451) Cherry-pick of zed-industries#58432 to preview ---- The parser stores emitted byte offsets between partial tool-call parses. Because partial JSON can be repaired differently as more bytes arrive, a byte offset that was valid in an earlier string can land inside a multibyte character in a later string. We now normalize those offsets with `find_char_boundary` before slicing. Added property tests covering boundary-sensitive write/edit streaming sequences to prevent regressions. Fixes Sentry ZED-8Y1 / 7523469866. 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 while streaming agent edits containing multibyte characters. Co-authored-by: Anthony Eid <56899983+Anthony-Eid@users.noreply.github.com>
jolutz
pushed a commit
to jolutz/zed
that referenced
this pull request
Aug 8, 2026
…industries#58432) The parser stores emitted byte offsets between partial tool-call parses. Because partial JSON can be repaired differently as more bytes arrive, a byte offset that was valid in an earlier string can land inside a multibyte character in a later string. We now normalize those offsets with `find_char_boundary` before slicing. Added property tests covering boundary-sensitive write/edit streaming sequences to prevent regressions. Fixes Sentry ZED-8Y1 / 7523469866. 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 while streaming agent edits containing multibyte characters.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The parser stores emitted byte offsets between partial tool-call parses. Because partial JSON can be repaired differently as more bytes arrive, a byte offset that was valid in an earlier string can land inside a multibyte character in a later string. We now normalize those offsets with
find_char_boundarybefore slicing.Added property tests covering boundary-sensitive write/edit streaming sequences to prevent regressions.
Fixes Sentry ZED-8Y1 / 7523469866.
Self-Review Checklist:
Release Notes: