Write about hangs and crashes

Author: delan

_posts/2025-12-12-november-in-servo.md

@@ -7,7 +7,7 @@ summary:    ao!! wrrrrao!!
 categories:
 ---
 
-Landing in [**Servo 0.0.3**](https://github.com/servo/servo/releases/tag/v0.0.3) and our November nightly builds, we now have **context menus** for links, images, and other web content (@atbrakhi, @mrobinson, #40434, #40501), **vsync on Android** (@mrobinson, #40306), plus several web platform features:
+Landing in [**Servo 0.0.3**](https://github.com/servo/servo/releases/tag/v0.0.3) and our November nightly builds, we now have **context menus** for links, images, and other web content (@atbrakhi, @mrobinson, #40434, #40501), **vsync on Android** (@mrobinson, #40306), **light mode** for the **new tab page** (@arihant2math, #40272), plus several web platform features:
 
 - **<video controls>** (@rayguo17, #40578)
 - **<use>** in SVG (@WaterWhisperer, #40684)
@@ -57,6 +57,10 @@ When running Servo without a custom [**ClipboardDelegate**](https://doc.servo.or
 But if there’s no system clipboard, we now have a built-in **fallback clipboard** (@mrobinson, #40408), rather than having no clipboard at all.
 Note that the fallback clipboard is very limited, as it can only store text and does not work across processes.
 
+## Performance and stability
+
+We’ve fixed a bug causing **nytimes.com** to hang (@jdm, #40811), as well as fixing crashes in **[Speedometer 3.0](https://www.browserbench.org/Speedometer3.0/)** and **[3.1](https://www.browserbench.org/Speedometer3.1/)** (@Narfinger, #40459), grid layout (@nicoburns, #40821), the fonts subsystem (@simonwuelker, #40913), XPath (@simonwuelker, #40411), ReadableStream (@Taym95, #40911), AudioContext (@Taym95, #40729), and when exiting Servo (@mrobinson, #40933).
+
 <style>
     ._correction {
         max-width: 33em;

commits.txt

@@ -831,7 +831,7 @@ https://github.com/servo/servo/pull/40409	(@mrobinson, #40409)	wpt: Ensure that
     # Testing: This should ensure that the `stable-unexpected-results-linux` artifact
     # is not empty when running WPT on CI.
 +https://github.com/servo/servo/pull/40411	(@simonwuelker, #40411)	xpath: Handle OOB conditions and non-char-boundaries in `substring` (#40411)
-    crash
+    ;crash
     # This change fixes two panics and cleans up a bunch of the surrounding code.
     # Testing: I've added new unit tests
 +https://github.com/servo/servo/pull/40314	(@simonwuelker, #40314)	script: Enforce exclusivity between <details> elements in the same tree (#40314)
@@ -1030,7 +1030,7 @@ https://github.com/servo/servo/pull/40377	(@sagudev, #40377)	CI: Switch to `maco
     # Testing: No behaviour change, just updating defaults.
     # Fixes: #39790
 +https://github.com/servo/servo/pull/40272	(@arihant2math, #40272)	Light mode for newtab page (#40272)
-    servoshell
+    ;servoshell
     # As requested, the mode changes per the preferences. I had to add a shadow to fix the contrast on light mode (the
     # colors/shadowing are roughly similar to the firefox new tab page).
 https://github.com/servo/servo/pull/40283	(@Narfinger, #40283)	Script: Efficient DOMString methods for as_bytes, eq_ascii, is_ascii, to_jsval (#40283)
@@ -1111,7 +1111,7 @@ https://github.com/servo/servo/pull/40371	(@Gae24, #40371)	script: remove microt
     # the System Font Service to prime the key cache whenever a new `WebView` is created.
     # Testing: This only modifies an internal optimization, so should be covered by existing tests.
 +https://github.com/servo/servo/pull/40459	(@Narfinger, #40459)	net: Do not implement `Serialize`/`Deserialize` for `RasterImage` and introduce``SharedRasterImage` (#40459)
-    crash; fix crash in Speedometer3.1
+    ;crash; fix crash in Speedometer3.1
     # RasterImage is now not seralizeable and backed by Vec storage. Add a new struct `SharedRasterImage` that allows
     # serializeing. This can be constructed from RasterImage. This introduces some more copying but I think the tradeoff
     # is ok. Newly introduced copies are for favicon response to the embedder and EmbedderNotifications.
@@ -2933,7 +2933,7 @@ https://github.com/servo/servo/pull/40757	(@kongbai1996, #40757)	compositing: Do
     # - Memoize some invariants of the parent
     # Testing: No wpt regressions: https://github.com/webbeef/servo/actions/runs/19493174678
     # This improves the `parseFromString()` benchmark by ~7% on my machine.
-https://github.com/servo/servo/pull/40473	(@monissaJ, @jschwe, #40473)	ohos CI: Add webdriver based scenario tests (#40473)
+-https://github.com/servo/servo/pull/40473	(@monissaJ, @jschwe, #40473)	ohos CI: Add webdriver based scenario tests (#40473)
     # Add webdriver based scripts to run scenario tests on OpenHarmony devices, with the purpose of testing functionality
     # in CI. For now passing these tests will not be enforced, as we first need to see how reliable the CI tests are in
     # daily usage.
@@ -3105,7 +3105,7 @@ https://github.com/servo/servo/pull/40733	(@TimvdLippe, #40733)	webdriver: imple
     # Testing: Refactor, but it is covered by WPT tests
     # Part of #40600
 +https://github.com/servo/servo/pull/40729	(@Taym95, #40729)	Fix RefCell already borrowed panic in HTMLMediaElement::set_audio_renderer (#40729)
-    crash
+    ;crash
     # Fix RefCell already borrowed panic in HTMLMediaElement::set_audio_renderer
     # Testing: new crash test should pass.
     # Fixes: #40720
@@ -3659,7 +3659,7 @@ https://github.com/servo/servo/pull/40647	(@simonwuelker, #40647)	fonts: Compute
     #     The hackfest
     # ```
 +https://github.com/servo/servo/pull/40821	(@nicoburns, #40821)	Upgrade Taffy to v0.9.2 (#40821)
-    crash; fix panic in grid layout
+    ;crash; fix panic in grid layout
     # Upgrades the patch version of Taffy (release notes: https://github.com/DioxusLabs/taffy/releases/tag/v0.9.2)
     # Testing: WPT tests
     # Fixes https://github.com/servo/servo/issues/40730
@@ -3709,7 +3709,7 @@ https://github.com/servo/servo/pull/40807	(@yerke, #40807)	servoshell: hide tab
     # Before:
     # After:
 +https://github.com/servo/servo/pull/40811	(@jdm, #40811)	script: Improve spec-compliance of Performance resource timing entries (#40811)
-    dom; fix hang on nytimes.com
+    ;dom; fix hang on nytimes.com
     # The current implementation doesn't match the specification and is broken in a way that makes nytimes.com endlessly
     # attempt to enqueue resource timing entries, making the page completely unresposive to user input. This PR makes
     # some surgical changes that fix the NYTimes behaviour and add some comments to make it easier to further improve
@@ -4433,7 +4433,7 @@ https://github.com/servo/servo/pull/40875	(@tharkum, #40875)	html: Use WeakRef f
     # [//]: # (dependabot-automerge-start)
     # [//]: # (dependabot-automerge-end)
 +https://github.com/servo/servo/pull/40913	(@simonwuelker, #40913)	fonts: Don't panic when font information contains invalid UTF-8 (#40913)
-    crash; fix panic with unusual fonts
+    ;crash; fix panic with unusual fonts
     # `freetype` gives us `*const c_char` which is not necessarily UTF-8. In some cases we can simply ignore such fonts
     # instead of panicking. (We can also save on allocation when comparing font formats)
     # Testing: Covered by existing tests
@@ -4689,7 +4689,7 @@ https://github.com/servo/servo/pull/40836	(@yezhizhen, #40836)	webdriver: Enable
     # Testing: We added WPT tests for "Find element", "Find element from element", "Find element from shadow root"
     # for both successful implicit wait and timeout case.
 +https://github.com/servo/servo/pull/40911	(@Taym95, #40911)	fix RefCell already borrowed panic in readablestream (#40911)
-    crash; fix panic in ReadableStream
+    ;crash; fix panic in ReadableStream
     # fixes an intermittent RefCell already borrowed panic in the ReadableStream implementation by tightening the borrow
     # scope of ReadableStream::reader in the error and cancel.
     # Testing: super hard to make crash test for this.
@@ -4711,7 +4711,7 @@ https://github.com/servo/servo/pull/40917	(@tharkum, #40917)	html: Add new media
 -https://github.com/servo/servo/pull/40934	(@nacho, #40934)	Fix various typos throughout the code base (#40934)
     # null
 +https://github.com/servo/servo/pull/40933	(@mrobinson, #40933)	servoshell: Schedule keyboard shortcut exits so that they can be done cleanly (#40933)
-    crash; fix crashes when exiting servo
+    ;crash; fix crashes when exiting servo
     # This is a speculative fix for a crash mentioned by @mukilan[^1]. It will
     # also make moving to a more consistent shutdown model (even one driven by
     # dropping of the `Servo` instance) possible.

outline.txt

@@ -2,21 +2,21 @@
     - https://github.com/servo/servo/pull/40925	(@lukewarlow, #40925)	servoshell: Add proper labels to UI elements (#40925)
       a11y
 - crash
-    - https://github.com/servo/servo/pull/40411	(@simonwuelker, #40411)	xpath: Handle OOB conditions and non-char-boundaries in `substring` (#40411)
+    - DONE https://github.com/servo/servo/pull/40411	(@simonwuelker, #40411)	xpath: Handle OOB conditions and non-char-boundaries in `substring` (#40411)
       crash
-    - https://github.com/servo/servo/pull/40459	(@Narfinger, #40459)	net: Do not implement `Serialize`/`Deserialize` for `RasterImage` and introduce``SharedRasterImage` (#40459)
+    - DONE https://github.com/servo/servo/pull/40459	(@Narfinger, #40459)	net: Do not implement `Serialize`/`Deserialize` for `RasterImage` and introduce``SharedRasterImage` (#40459)
       crash; fix crash in Speedometer3.1
-    - https://github.com/servo/servo/pull/40729	(@Taym95, #40729)	Fix RefCell already borrowed panic in HTMLMediaElement::set_audio_renderer (#40729)
+    - DONE https://github.com/servo/servo/pull/40729	(@Taym95, #40729)	Fix RefCell already borrowed panic in HTMLMediaElement::set_audio_renderer (#40729)
       crash
-    - https://github.com/servo/servo/pull/40821	(@nicoburns, #40821)	Upgrade Taffy to v0.9.2 (#40821)
+    - DONE https://github.com/servo/servo/pull/40821	(@nicoburns, #40821)	Upgrade Taffy to v0.9.2 (#40821)
       crash; fix panic in grid layout
-    - https://github.com/servo/servo/pull/40913	(@simonwuelker, #40913)	fonts: Don't panic when font information contains invalid UTF-8 (#40913)
+    - DONE https://github.com/servo/servo/pull/40913	(@simonwuelker, #40913)	fonts: Don't panic when font information contains invalid UTF-8 (#40913)
       crash; fix panic with unusual fonts
-    - https://github.com/servo/servo/pull/40911	(@Taym95, #40911)	fix RefCell already borrowed panic in readablestream (#40911)
+    - DONE https://github.com/servo/servo/pull/40911	(@Taym95, #40911)	fix RefCell already borrowed panic in readablestream (#40911)
       crash; fix panic in ReadableStream
-    - https://github.com/servo/servo/pull/40933	(@mrobinson, #40933)	servoshell: Schedule keyboard shortcut exits so that they can be done cleanly (#40933)
+    - DONE https://github.com/servo/servo/pull/40933	(@mrobinson, #40933)	servoshell: Schedule keyboard shortcut exits so that they can be done cleanly (#40933)
       crash; fix crashes when exiting servo
-    - https://github.com/servo/servo/pull/40953	(@mrobinson, #40953)	servoshell: Always exit via `RunningAppState::schedule_exit` (#40953)
+    - DONE https://github.com/servo/servo/pull/40953	(@mrobinson, #40953)	servoshell: Always exit via `RunningAppState::schedule_exit` (#40953)
       crash
 - devtools
     - https://github.com/servo/servo/pull/40328	(@mark-buer, #40328)	devtools: Expose cache status for requests in network monitor. (#40328)
@@ -42,7 +42,7 @@
       dom; exception messages
     - https://github.com/servo/servo/pull/40636	(@mukilan, #40636)	net: Relax the SVG content type detection logic. (#40636)
       dom; fixed SVG rendering with Content-Type parameters
-    - https://github.com/servo/servo/pull/40811	(@jdm, #40811)	script: Improve spec-compliance of Performance resource timing entries (#40811)
+    - DONE https://github.com/servo/servo/pull/40811	(@jdm, #40811)	script: Improve spec-compliance of Performance resource timing entries (#40811)
       dom; fix hang on nytimes.com
     - https://github.com/servo/servo/pull/40447	(@stevennovaryo, #40447)	dom: Focus scroll to the element only if it is not visible (#40447)
       dom; focus no longer scrolls if element is visible
@@ -111,7 +111,7 @@
     - https://github.com/servo/servo/pull/40725	(@mrobinson, #40725)	script: Use a `WeakRef` for references to `WebGLRenderingContext` (#40725)
       security; fix use-after-free in WebGL
 - servoshell
-    - https://github.com/servo/servo/pull/40272	(@arihant2math, #40272)	Light mode for newtab page (#40272)
+    - DONE https://github.com/servo/servo/pull/40272	(@arihant2math, #40272)	Light mode for newtab page (#40272)
       servoshell
 - testing
     - https://github.com/servo/servo/pull/40291	(@mrobinson, #40291)	wpt: Enable WebDriver by default when running WPT (#40291)