Bug 239000

Summary: U+0622 + U+064E crash browser: "a problem repeatedly occurred"
Product: WebKit Reporter: mustafa.0x
Component: Layout and RenderingAssignee: Nobody <webkit-unassigned>
Status: RESOLVED CONFIGURATION CHANGED    
Severity: Normal CC: ap, bfulgham, simon.fraser, zalan
Priority: P2    
Version: Safari Technology Preview   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
screenshot none

Description mustafa.0x 2022-04-08 07:50:14 PDT 
```
<meta charset=utf-8>
آَ
```

Release 142 (Safari 15.4, WebKit 17614.1.5.16)

This combo is a typo, but even so, a browser crash is unwarranted. Similar combos may also cause crashes.
Comment 1 zalan 2022-04-08 08:39:14 PDT 
Thanks for reporting this issue. Unfortunately I am not able to reproduce the crash by just copy-pasting the "آَ" content and neither by constructing a test case by using the associated HTML entities (&#1614;&#x64E; etc). Would you mind attaching the actual markup that reproduces this crash, please? Thanks!
Comment 2 mustafa.0x 2022-04-08 08:44:05 PDT 
It seems that you didn't copy the <meta> tag as well.

Copy and paste this in the address bar:

data:text/html,<meta charset=utf-8>آَ
Comment 3 Simon Fraser (smfr) 2022-04-08 09:41:27 PDT 
What OS version are you reproducing this on? Can you find a crash log (via Console.app) and attach it?
Comment 4 mustafa.0x 2022-04-08 11:46:51 PDT 
Created attachment 457104 [details]
screenshot

Occurs on macOS 12.2 and also on iOS 15.

It doesn't crash the browser, just the renderer.

Here's a codepen:
https://codepen.io/mustafa0x/pen/QWarrZe
Comment 5 Alexey Proskuryakov 2022-04-08 14:35:58 PDT 
This is the same stack trace as rdar://87542346, which got fixed in macOS 12.3. I can reproduce on macOS 12.2.1 byt simply opening this bugzilla page.

The fix was not in WebKit, but in underlying system frameworks.