Commit Graph
22374 Commits
Author SHA1 Message Date
6ea4d2b30d agent: Fix MCP server handler subscription race condition (#32133)
Closes #32132

Release Notes:

- Fixed MCP server handler subscription race condition causing tools to
not load.

---------

Co-authored-by: Bennet Bo Fenner <bennet@zed.dev>
Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>
2025-06-06 15:32:06 +02:00
Kirill Bulatov 380d8c5662 Pull diagnostics fixes (#32242)
Follow-up of https://github.com/zed-industries/zed/pull/19230

* starts to send `result_id` in pull requests to allow servers to reply
with non-full results
* fixes a bug where disk-based diagnostics were offset after pulling the
diagnostics
* fixes a bug due to which pull diagnostics could not be disabled
* uses better names and comments for the workspace pull diagnostics part

Release Notes:

- N/A
2025-06-06 16:18:05 +03:00
Ben Kunkle 508b604b67 project: Try to make git tests less flaky (#32234)
Closes #ISSUE

Release Notes:

- N/A *or* Added/Fixed/Improved ...
2025-06-06 13:01:42 +00:00
chbk 3da1de2a48 Add JSDoc scope (#29476)
This is a small PR that adds a `.jsdoc` scope to JSDoc tokens, just like
[JSX](https://github.com/zed-industries/zed/blob/3fdbc3090d2cc5c2e24014009cccbe5e7c55d217/crates/languages/src/javascript/highlights.scm#L239)
has a specific scope.
This effectively allows differentiating between JavaScript keywords and
JSDoc tags in comments.

Release Notes:

  - Add scope for JSDoc
2025-06-06 08:31:59 -04:00
Dave Waggoner 8837e5564d Add new terminal hyperlink tests (#28525)
Part of #28238

This PR refactors `FindHyperlink` handling and associated code in
`terminal.rs` into its own file for improved testability, and adds
tests.

Release Notes:

- N/A
2025-06-06 08:08:20 -04:00
Ben BrandtandBen Kunkle 709523bf36 Store profile per thread (#31907)
This allows storing the profile per thread, as well as moving the logic
of which tools are enabled or not to the profile itself.

This makes it much easier to switch between profiles, means there is
less global state being changed on every profile change.

Release Notes:

- agent panel: allow saving the profile per thread

---------

Co-authored-by: Ben Kunkle <ben.kunkle@gmail.com>
2025-06-06 12:05:27 +00:00
Piotr Osiewicz 7afee64119 multi_buffer: Refactor diff_transforms field into a separate struct (#32237)
A minor refactor ~needed to unblock #22546; it's pretty hard to add an
extra field to `diff_transforms` dimension, as it is a 2-tuple (which
uses a blanket impl)

Release Notes:

- N/A
2025-06-06 11:06:42 +00:00
Roland Crosby be6f29cc28 terminal: Use conventional XTerm indexed color values (#32200)
Fixes rendering of colors in the terminal to use XTerm's idiosyncratic standard steps instead of the range that was previously in use. Matches the behavior of Alacritty, Ghostty, iTerm2, and every other terminal emulator I've looked at.

Release Notes:

- Fixed rendering of terminal colors for the XTerm 256-color indexed color palette.
2025-06-06 13:02:07 +03:00
38b8e6549f ci: Check for broken links (#30844)
This PR fixes some broken links that where found using
[lychee](https://github.com/lycheeverse/lychee/) as discussed today with
@JosephTLyons and @nathansobo at the RustNL hackathon. Using
[lychee-action](https://github.com/lycheeverse/lychee-action/) we can
scan for broken links daily to prevent issues in the future.
There are still 6 broken links that I didn't know how to fix myself.
See https://github.com/thomas-zahner/zed/actions/runs/15075808232 for
details.

## Missing images

```
Errors in ./docs/src/channels.md

    [ERROR] file:///home/runner/work/zed/zed/docs/.gitbook/assets/channels-3.png | Cannot find file
    [ERROR] file:///home/runner/work/zed/zed/docs/.gitbook/assets/channels-1.png | Cannot find file
    [ERROR] file:///home/runner/work/zed/zed/docs/.gitbook/assets/channels-2.png | Cannot find file
```

These errors are showing up as missing images on
https://zed.dev/docs/channels
I tried to search the git history to see when or why they were deleted
but didn't find anything.

## ./crates/assistant_tools/src/edit_agent/evals/fixtures/zode/prompt.md

There are three errors in that file. I don't fully understand how these
issues were caused historically. Technically it would be possible to
ignore the files but of course if possible we should address the issues.
 
Release Notes:

- N/A

---------

Co-authored-by: Marshall Bowers <git@maxdeviant.com>
Co-authored-by: Ben Kunkle <ben@zed.dev>
2025-06-06 09:39:35 +00:00
Umesh Yadav b8c1b54f9e language_models: Fix Mistral tool->user message sequence handling (#31736)
Closes #31491

### Problem
Mistral API enforces strict conversation flow requirements that other
providers don't. Specifically, after a `tool` message, the next message
**must** be from the `assistant` role, not `user`. This causes the
error:
```
"Unexpected role 'user' after role 'tool'"
```
This can also occur in normal conversation flow where mistral doesn't
return the assistant message but that is something which can't be
reproduce reliably.

### Root Cause
When users interrupt an ongoing tool call sequence by sending a new
message, we insert a `user` message directly after a `tool` message,
violating Mistral's protocol.

**Expected Mistral flow:**
```
user → assistant (with tool_calls) → tool (results) → assistant (processes results) → user (next input)
```

**What we were doing:**
```
user → assistant (with tool_calls) → tool (results) → user (interruption) 
```

### Solution
Insert an empty `assistant` message between any `tool` → `user` sequence
in the Mistral provider's request construction. This satisfies Mistral's
API requirements without affecting other providers or requiring UX
changes.

### Testing
To reproduce the original error:
1. Start agent chat with `codestral-latest`
2. Send: "Describe this project using tool call only"
3. Once tool calls begin, send: "stop this"
4. Main branch: API error
5. This fix: Works correctly

Release Notes:

- Fixed Mistral tool calling in some cases
2025-06-06 12:35:22 +03:00
Jakub SygnowskiandBen Kunkle c304e964fe Display the first keystroke instead of an error for multi-keystroke binding (#31456)
Ideally we would show multi-keystroke binding, but I'd say this improves
over the status quo.

A partial solution to #27334

Release Notes:

- Fixed spurious warning for lack of edit prediction on multi-keystroke
binding

Co-authored-by: Ben Kunkle <ben@zed.dev>
2025-06-06 09:30:57 +00:00
Joseph T. Lyons 53abad5979 Fixed more bugs around moving pinned tabs (#32228)
Closes https://github.com/zed-industries/zed/issues/32199
https://github.com/zed-industries/zed/issues/32229
https://github.com/zed-industries/zed/issues/32230
https://github.com/zed-industries/zed/issues/32232

Release Notes:

- Fixed a bug where if the last tab was a pinned tab and it was dragged
to the right, resulting in a no-op, it would become unpinned
- Fixed a bug where a pinned tab dragged just to the right of the end of
the pinned tab region would become unpinned
- Fixed a bug where dragging a pinned tab from one pane to another
pane's pinned region could result in an existing pinned tab becoming
unpinned when `max_tabs` was reached
- Fixed a bug where moving an unpinned tab to the left, just to the end
of the pinned region, would cause the pinned tabs to become unpinned.
2025-06-06 05:09:48 -04:00
张小白 54e64b2407 windows: Refactor the current ime implementation (#32224)
Release Notes:

- N/A
2025-06-06 07:31:45 +00:00
Michael Sloan 3e8565ac25 Initialize zlog default filters on init rather than waiting for settings load (#32209)
Now immediately initializes the zlog filter even when there isn't an env
config. Before this change the default filters were applied after
settings load - I was seeing some `zbus` logs on init.

Also defaults to allowing warnings and errors from the suppressed log
sources. If these turn out to be chatty (they don't seem to be so far),
can bring back more suppression.

Release Notes:

- N/A
2025-06-06 00:49:30 -06:00
Michael Sloan d801b7b12e Fix bindings_for_action handling of shadowed key bindings (#32220)
Fixes two things:

* ~3 months ago [in PR
#26420](https://github.com/zed-industries/zed/pull/26420/files#diff-33b58aa2da03d791c2c4761af6012851b7400e348922d64babe5fd48ac2a8e60)
`bindings_for_action` was changed to return bindings even when they are
shadowed (when the keystrokes would actually do something else).

* For edit prediction keybindings there was some odd behavior where
bindings for `edit_prediction_conflict` were taking precedence over
bindings for `edit_prediction` even when the `edit_prediction_conflict`
predicate didn't match. The workaround for this was #24812. The way it
worked was:

    - List all bindings for the action

- For each binding, get the highest precedence binding with the same
input sequence

- If the highest precedence binding has the same action, include this
binding. This was the bug - this meant that if a binding in the keymap
has the same keystrokes and action it can incorrectly take display
precedence even if its context predicate does not pass.

- Fix is to check that the highest precedence binding is a full match.
To do this efficiently, it's based on an index within the keymap
bindings.

Also adds `highest_precedence_binding_*` variants which avoid the
inefficiency of building lists of bindings just to use the last.

Release Notes:

- Fixed display of keybindings to skip bindings that are shadowed by a
binding that uses the same keystrokes.
- Fixed display of `editor::AcceptEditPrediction` bindings to use the
normal precedence that prioritizes user bindings.
2025-06-06 06:24:59 +00:00
张小白 37fa42d5cc windows: Fix a typo in function name (#32223)
Release Notes:

- N/A
2025-06-06 06:24:05 +00:00
Michael Sloan 5c9b8e8321 Move workspace::toast_layer::RunAction to zed_actions::toast::RunAction (#32222)
Cleaner to have references to this be `toast::RunAction` matching how it
appears in the keymap, instead of `workspace::RunAction`.

Release Notes:

- N/A
2025-06-06 06:23:09 +00:00
Lucas 96609151c6 Fix typo in assistant_tool.rs (#32207)
Release Notes:

- N/A
2025-06-06 05:23:25 +00:00
Joseph T. Lyons e37c78bde7 Refactor some logic in handle_tab_drop (#32213)
Tiny little clean up PR after #32184 

Release Notes:

- N/A
2025-06-06 04:49:36 +00:00
Michael Sloan 920ca688a7 Display subtle-mode prediction preview when partial accept modifiers held (#32212)
Closes #27567

Release notes covered by the notes for #32193

Release Notes:

- N/A
2025-06-06 02:52:16 +00:00
Julia RyanandConrad Irwin f62d76159b Fix matching braces in jsx/tsx tags (#32196)
Closes #27998

Also fixed an issue where jumping back from closing to opening tags
didn't work in javascript due to missing brackets in our tree-sitter
query.

Release Notes:

- N/A

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
2025-06-05 18:10:22 -07:00
Smit Barmase 6a8fdbfd62 editor: Add multi cursor support for AddSelectionAbove/AddSelectionBelow (#32204)
Closes #31648

This PR adds support for:
- Expanding multiple cursors above/below
- Expanding multiple selections above/below
- Adding new cursors/selections when expansion has already been done.
Existing expansions preserve their state and expand/shrink according to
the action, while new cursors/selections act like freshly created ones.

Tests for both cursor and selections:
- below/above cases
- undo/redo cases
- adding new cursors/selections with existing expansion

Before/After:


https://github.com/user-attachments/assets/d2fd556b-8972-4719-bd86-e633d42a1aa3


Release Notes:

- Improved `AddSelectionAbove` and `AddSelectionBelow` to extend
multiple cursors/selections.
2025-06-06 06:20:12 +05:30
Michael Sloan 711a9e5753 x11: Remove logs for mac-os specific set_edited and show_character_palette (#32203)
Release Notes:

- N/A
2025-06-06 00:14:20 +00:00
Michael Sloan 6de5d29bff Fix caching of Node.js runtime paths and improve error messages (#32198)
* `state.last_options` was never being updated, so the caching wasn't
working.

* If node on the PATH was too old it was logging errors on every
invocation even though managed node is being used.

Release Notes:

- Fixed caching of Node.js runtime paths and improved error messages.
2025-06-05 23:35:43 +00:00
Joseph T. Lyons d7015e5b8f Fix bugs around tab state loss when moving pinned tabs across panes (#32184)
Closes https://github.com/zed-industries/zed/issues/32181,
https://github.com/zed-industries/zed/issues/32179

In the screenshots: left = nightly, right = dev

Fix 1: A pinned tab dragged into a new split should remain pinned


https://github.com/user-attachments/assets/608a7e10-4ccb-4219-ba81-624298c960b0

Fix 2: Moving a pinned tab from one pane to another should not cause
other pinned tabs to be unpinned


https://github.com/user-attachments/assets/ccc05913-591d-4a43-85bb-3a7164a4d6a8

I also added tests for moving both pinned tabs and unpinned tabs into
existing panes, both into the "pinned" region and the "unpinned" region.

Release Notes:

- Fixed a bug where dragging a pinned tab into a new split would lose
its pinned tab state.
- Fixed a bug where pinned tabs in one pane could be lost when moving
one of the pinned tabs to another pane.
2025-06-05 22:31:30 +00:00
Ben Brandt ddf70b3bb8 Add mismatched tag threshold parameter to eval function (#32190)
Replace hardcoded 0.10 threshold with configurable parameter and set
0.05 default for most tests, with 0.2 for from_pixels_constructor
eval that produces more mismatched tags.

Release Notes:

- N/A
2025-06-05 21:30:05 +00:00
Conrad Irwin 4b297a9967 Fix innermost brackets panic (#32120)
Release Notes:

- Fixed a few rare panics that could happen when a multibuffer excerpt
started with expanded deleted content.
2025-06-05 20:24:56 +00:00
7aa70a4858 lsp: Implement support for the textDocument/diagnostic command (#19230)
Closes [#13107](https://github.com/zed-industries/zed/issues/13107)

Enabled pull diagnostics by default, for the language servers that
declare support in the corresponding capabilities.

```
"diagnostics": {
    "lsp_pull_diagnostics_debounce_ms": null
}
```
settings can be used to disable the pulling.

Release Notes:

- Added support for the LSP `textDocument/diagnostic` command.

# Brief

This is draft PR that implements the LSP `textDocument/diagnostic`
command. The goal is to receive your feedback and establish further
steps towards fully implementing this command. I tried to re-use
existing method and structures to ensure:

1. The existing functionality works as before
2. There is no interference between the diagnostics sent by a server and
the diagnostics requested by a client.

The current implementation is done via a new LSP command
`GetDocumentDiagnostics` that is sent when a buffer is saved and when a
buffer is edited. There is a new method called `pull_diagnostic` that is
called for such events. It has debounce to ensure we don't spam a server
with commands every time the buffer is edited. Probably, we don't need
the debounce when the buffer is saved.

All in all, the goal is basically to get your feedback and ensure I am
on the right track. Thanks!


## References

1.
https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_pullDiagnostics

## In action

You can clone any Ruby repo since the `ruby-lsp` supports the pull
diagnostics only.

Steps to reproduce:

1. Clone this repo https://github.com/vitallium/stimulus-lsp-error-zed
2. Install Ruby (via `asdf` or `mise).
4. Install Ruby gems via `bundle install`
5. Install Ruby LSP with `gem install ruby-lsp`
6. Check out this PR and build Zed
7. Open any file and start editing to see diagnostics in realtime.



https://github.com/user-attachments/assets/0ef6ec41-e4fa-4539-8f2c-6be0d8be4129

---------

Co-authored-by: Kirill Bulatov <mail4score@gmail.com>
Co-authored-by: Kirill Bulatov <kirill@zed.dev>
2025-06-05 19:42:52 +00:00
Oleksiy Syvokon 04cd3fcd23 google: Add latest versions of Gemini 2.5 Pro and Flash Preview (#32183)
Release Notes:

- Added the latest versions of Gemini 2.5 Pro and Flash Preview
2025-06-05 19:30:34 +00:00
Michael Sloan d15d85830a snippets: Fix tabstop completion choices (#31955)
I'm not sure when snippet tabstop choices broke, I checked the parent of
#31872 and they also don't work before that.

Release Notes:

- N/A
2025-06-05 19:17:41 +00:00
Michael Sloan 03a030fd00 Add default method for CompletionProvider::resolve_completions (#32045)
Release Notes:

- N/A
2025-06-05 19:15:06 +00:00
Richard Feldman 894f3b9d15 Make a test no longer pub (#32177)
I spotted this while working on something else. Very quick fix!

Release Notes:

- N/A
2025-06-05 17:27:45 +00:00
Cole MillerandAnthony Eid f36143a461 debugger: Run locators on LSP tasks for the new process modal (#32097)
- [x] pass LSP tasks into list_debug_scenarios
- [x] load LSP tasks only once for both modals
- [x] align ordering
- [x] improve appearance of LSP debug task icons
- [ ] reconsider how `add_current_language_tasks` works
- [ ] add a test

Release Notes:

- Debugger Beta: Added debuggable LSP tasks to the "Debug" tab of the
new process modal.

---------

Co-authored-by: Anthony Eid <hello@anthonyeid.me>
2025-06-05 13:25:51 -04:00
Cole Miller 783b33b5c9 git: Rewrap commit messages just before committing instead of interactively (#32114)
Closes #27508 

Release Notes:

- Fixed unintuitive wrapping behavior when editing Git commit messages.
2025-06-05 17:12:17 +00:00
Bennet Bo FennerandRichard Feldman 28da99cc06 anthropic: Fix error when attaching multiple images (#32092)
Closes #31438

Release Notes:

- agent: Fixed an edge case were the request would fail when using
Claude and multiple images were attached

---------

Co-authored-by: Richard Feldman <oss@rtfeldman.com>
2025-06-05 16:29:49 +00:00
Cole Miller d2c265c71f debugger: Change some text in the launch tab (#32170)
I think using `Debugger Program` and `~/bin/debugger` here makes it seem
like that field is for specifying the path to the debugger itself, and
not the program being debugged.

Release Notes:

- N/A
2025-06-05 12:29:18 -04:00
张小白 5b9d3ea097 windows: Only call TranslateMessage when we can't handle the event (#32166)
This PR improves key handling on Windows by moving the
`TranslateMessage` call from the message loop to after we handled
`WM_KEYDOWN`. This brings Windows behavior more in line with macOS and
gives us finer control over key events. As a result, Vim keybindings now
work properly even when an IME is active. The trade-off is that it might
introduce a slight delay in text input.


Release Notes:

- N/A
2025-06-05 23:57:47 +08:00
tidely 738cfdff84 gpui: Simplify u8 to u32 conversion (#32099)
Removes an allocation when converting four u8 into a u32.
Makes some functions const compatible.

Release Notes:

- N/A
2025-06-05 23:57:27 +08:00
Cole Miller 32d5a2cca0 debugger: Fix wrong variant of new process modal deployed (#32168)
I think this was added back when the `Launch` variant meant what we now
call `Debug`

Release Notes:

- N/A
2025-06-05 15:51:13 +00:00
Ben BrandtandOleksiy Syvokon dda614091a eval: Add eval unit tests as a CI job (#32152)
We run the unit evals once a day in the middle of the night, and trigger
a Slack post if it fails.


Release Notes:

- N/A

---------

Co-authored-by: Oleksiy Syvokon <oleksiy.syvokon@gmail.com>
2025-06-05 13:16:27 +00:00
Hans fa9da6ad5b Fix typo (#32160)
Release Notes:

- N/A
2025-06-05 12:59:22 +00:00
Piotr Osiewiczand张小白 d082cfdbec lsp: Fix language servers not starting up on save (#32156)
Closes #24349

Release Notes:

- Fixed language servers not starting up when a buffer is saved.

---------

Co-authored-by: 张小白 <364772080@qq.com>
2025-06-05 14:22:34 +02:00
张小白 c71791d64e windows: Fix Japanese IME (#32153)
Fixed an issue where pressing `Escape` wouldn’t clear all pre-edit text
when using Japanese IME.


Release Notes:

- N/A
2025-06-05 12:13:09 +00:00
InfyniteHeap 244d8517f1 Fix Unexpected Console Window When Running Zed Release Build (#32144)
The commit #31073 had introduced `zed-main.rs`, which replaced the
previous `main.rs` to be the "true" entry of the whole program. But as
the macro `#![cfg_attr(not(debug_assertions), windows_subsystem =
"windows")]` only works in the "true" entry, the release build will also
arise the console window if this macro doesn't move to the new entry
(the `zed-main.rs` here).


Release Notes:

- N/A
2025-06-05 19:38:19 +08:00
Oleksiy SyvokonandBen Brandt 3884de937b assistant: Partial fix for HTML entities in tools params (#32148)
This problem seems to be specific to Opus 4. Eval shows improvement from
89% to 97%.

Closes: https://github.com/zed-industries/zed/issues/32060

Release Notes:

- N/A

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
2025-06-05 10:36:55 +00:00
Richard Feldman 8af984ae70 Have tools respect private and excluded file settings (#32036)
Based on a Slack conversation with @notpeter - this prevents secrets in
private/excluded files from being sent by the agent to third parties for
tools that don't require confirmation.

Of course, the agent can still use the terminal tool or MCP to access
these, but those require confirmation before they run (unlike these
tools).

This change doesn't seem to cause any trouble for evals:

<img width="730" alt="Screenshot 2025-06-03 at 8 48 33 PM"
src="https://github.com/user-attachments/assets/d90221be-f946-4af2-b57b-4aa047e86853"
/>


Release Notes:

- N/A
2025-06-05 10:02:11 +02:00
Kirill Bulatov 9d533f9d30 Allow to reuse windows in open remote projects dialogue (#32138)
Closes https://github.com/zed-industries/zed/issues/26276

Same as other "open window" actions like "open recent", add a
`"create_new_window": false` (default `false`) argument into the
`projects::OpenRemote` action.

Make all menus to use this default; allow users to change this in the
keybindings.
Same as with other actions, `cmd`/`ctrl` inverts the parameter value.

<img width="554" alt="default"
src="https://github.com/user-attachments/assets/156d50f0-6511-47b3-b650-7a5133ae9541"
/>

<img width="552" alt="override"
src="https://github.com/user-attachments/assets/cf7d963b-86a3-4925-afec-fdb5414418e1"
/>

Release Notes:

- Allowed to reuse windows in open remote projects dialogue
2025-06-05 07:09:09 +00:00
Cole Miller 9c7b1d19ce Fix a panic in merge conflict parsing (#32119)
Release Notes:

- Fixed a panic that could occur when editing files containing merge
conflicts.
2025-06-04 20:05:26 -04:00
Michael SloanandBen 3d9881121f Reapply support for pasting images on x11 (#32121)
This brings back [linux(x11): Add support for pasting images from
clipboard · Pull Request
#29387](https://github.com/zed-industries/zed/pull/29387) while fixing
#30523 (which caused it to be reverted).

Commit message from that PR:

> Closes:
https://github.com/zed-industries/zed/pull/29177#issuecomment-2823359242
>
> Removes dependency on
[quininer/x11-clipboard](https://github.com/quininer/x11-clipboard) as
it is in [maintenance
mode](https://github.com/quininer/x11-clipboard/issues/19).
>
> X11 clipboard functionality is now built-in to GPUI which was
accomplished by stripping the non-x11-related code/abstractions from
[1Password/arboard](https://github.com/1Password/arboard) and extending
it to support all image formats already supported by GPUI on wayland and
macos.
>
> A benefit of switching over to the `arboard` implementation, is that
we now make an attempt to have an X11 "clipboard manager" (if available
- something the user has to setup themselves) save the contents of
clipboard (if the last copy operation was within Zed) so that the copied
contents can still be pasted once Zed has completely stopped.

Before the fix for reapply, it was iterating through the formats and
requesting conversion to each. Some clipboard providers just respond
with a different format rather than saying the format is unsupported.
The fix is to use this response if it matches a supported format. It
also now typically avoids this iteration by requesting the `TARGETS` and
taking the highest precedence supported target.

Closes #30523

Release Notes:

- Linux (X11): Restored the ability to paste images.

---------

Co-authored-by: Ben <ben@zed.dev>
2025-06-05 00:05:11 +00:00
Conrad Irwin a2e98e9f0e Fix potential race-condition in DisplayLink::drop on macOS (#32116)
Fix a segfault in CVDisplayLink

We see 1-2 crashes a day on macOS on the `CVDisplayLink` thread.

```
Segmentation fault: 11 on thread 9325960 (CVDisplayLink)
CoreVideo	CVHWTime::reset()
CoreVideo	CVXTime::reset()
CoreVideo	CVDisplayLink::runIOThread()
libsystem_pthread.dylib	_pthread_start
libsystem_pthread.dylib	thread_start
```

With the help of the Zed AI, I dove into the crash report, which looks
like this:

```
Crashed Thread:        49  CVDisplayLink

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x00000000000001f6
Exception Codes:       0x0000000000000001, 0x00000000000001f6

Thread 49 Crashed:: CVDisplayLink
0   CoreVideo                     	       0x18c1ed994 CVHWTime::reset() + 64
1   CoreVideo                     	       0x18c1ee474 CVXTime::reset() + 52
2   CoreVideo                     	       0x18c1ee198 CVDisplayLink::runIOThread() + 176
3   libsystem_pthread.dylib       	       0x18285ac0c _pthread_start + 136
4   libsystem_pthread.dylib       	       0x182855b80 thread_start + 8

Thread 49 crashed with ARM Thread State (64-bit):
    x0: 0x0000000000000000   x1: 0x000000018c206e08   x2: 0x0000002c00001513   x3: 0x0001d4630002a433
    x4: 0x00000e2100000000   x5: 0x0001d46300000000   x6: 0x000000000000002c   x7: 0x0000000000000000
    x8: 0x000000000000002e   x9: 0x000000004d555458  x10: 0x0000000000000000  x11: 0x0000000000000000
   x12: 0x0000000000000000  x13: 0x0000000000000000  x14: 0x0000000000000000  x15: 0x0000000000000000
   x16: 0x0000000182856a9c  x17: 0x00000001f19bc540  x18: 0x0000000000000000  x19: 0x0000600003c56ed8
   x20: 0x000000000002a433  x21: 0x0000000000000000  x22: 0x0000000000000000  x23: 0x0000000000000000
   x24: 0x0000000000000000  x25: 0x0000000000000000  x26: 0x0000000000000000  x27: 0x0000000000000000
   x28: 0x0000000000000000   fp: 0x000000016b02ade0   lr: 0x000000018c1ed984
    sp: 0x000000016b02adc0   pc: 0x000000018c1ed994 cpsr: 0x80001000
   far: 0x00000000000001f6  esr: 0x92000006 (Data Abort) byte read Translation fault

Binary Images:
       0x1828c9000 -        0x182e07fff com.apple.CoreFoundation (6.9) <df489a59-b4f6-32b8-9bb4-9b832960aa52> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
```

Using lldb to disassemble `CVHWTime::reset()` (and the AI to interpret
it), the crash is caused by dereferencing the pointer at the start of
the CVHWTime struct + 0x1c8. In this case the pointer has (the clearly
nonsense) value 0x2e (and 0x2e + 0x1c8 = 0x1f6, the failing address).

As to how this could happen...

Looking at the implementation of `CVDisplayLinkRelease`, it calls
straight into `CFRelease` on the main thread; and so it is not safe to
call `CVDisplayLinkRelease` concurrently with other threads that access
the CVDisplayLink. While we already stopped the display link, it turns
out that `CVDisplayLinkStop` just sets a flag on the struct to instruct
the io-thread to exit "soon", and returns immediately. That means we
don't know when the other thread will actually exit, and so we can't
safely call `CVDisplayLinkRelease`.

So, for now, we just leak these objects. They should be created
relatively infrequently (when the app is foregrounded/backgrounded), so
I don't think this is a huge problem.

Release Notes:

- Fix a rare crash on macOS when putting the app in the background.
2025-06-04 17:10:27 -06:00