Bug 71475

Summary: REGRESSION: Scrolling doesn't update content area in nested overflow-y:auto divs
Product: WebKit Reporter: asvitkine
Component: Layout and RenderingAssignee: Julien Chaffraix <jchaffraix>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: hyatt, jchaffraix, mitz
Priority: P1 Keywords: Regression
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Test case
none
WIP change: undertested, likely too much recomputations, will think it over on Monday. none

asvitkine
Reported 2011-11-03 08:20:18 PDT
Attached reduced testcase (from a PHPBB forum page) has two fixed height divs both with scroll bars. The inner div's content doesn't update when you scroll it via the inner scroll bar. According to Chromium's bisect-builds.py, this regressed between WebKit revisions 93556 and 93643.
Attachments
Test case (1.21 KB, text/html)
2011-11-03 08:20 PDT, asvitkine 		no flags
Details
WIP change: undertested, likely too much recomputations, will think it over on Monday. (11.42 KB, patch)
2011-11-04 21:22 PDT, Julien Chaffraix 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
asvitkine
Comment 1 2011-11-03 08:20:47 PDT
Created attachment 113496 [details] Test case
asvitkine
Comment 4 2011-11-03 08:28:14 PDT
Suspecting it might be this change: "Reduce the amount of RenderLayer rectangles' update when scrolling" http://trac.webkit.org/changeset/93614/trunk
Julien Chaffraix
Comment 5 2011-11-04 12:08:41 PDT
Confirmed. Taking over as this is a bad regression.
Julien Chaffraix
Comment 6 2011-11-04 21:22:49 PDT
Created attachment 113750 [details] WIP change: undertested, likely too much recomputations, will think it over on Monday.
Julien Chaffraix
Comment 7 2011-11-07 16:56:38 PST
webkit-patch attached the patch to the wrong bug (should have gone to bug 71550). Merging the 2 bugs together. *** This bug has been marked as a duplicate of bug 71550 ***
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