Bug 157471

Summary: -webkit-isolate incorrectly measures width of inline elements
Product: WebKit Reporter: Derk-Jan Hartman <hartman.wiki>
Component: CSSAssignee: Myles C. Maxfield <mmaxfield>
Status: NEW ---    
Severity: Normal CC: mmaxfield, simon.fraser, zalan
Priority: P2    
Version: Safari 9   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Page with css statement applied
none
Page with css statement disabled
none
webarchive of page in the screenshots
none
Test reduction none

Description Derk-Jan Hartman 2016-05-09 04:04:46 PDT
Created attachment 278399 [details]
Page with css statement applied

Although the tab lockup of #148573 seems fixed in Safari 9, it seems that it is incorrectly measuring the width of inline elements (spanning multiple lines ???). Content overflows outside of the expected boundaries and random spacing is introduced between words.

Attached are a screenshot of a page with -webkit-isolate enabled on the .comment class, a screenshot with the rule disabled and a webarchive of the page.

This problem does not occur in Chrome.
Comment 1 Derk-Jan Hartman 2016-05-09 04:05:11 PDT
Created attachment 278400 [details]
Page with css statement disabled
Comment 2 Derk-Jan Hartman 2016-05-09 04:05:48 PDT
Created attachment 278401 [details]
webarchive of page in the screenshots
Comment 3 zalan 2016-05-10 11:58:24 PDT
Created attachment 278517 [details]
Test reduction