254746 - Fixed pos. block changes height when focusing a link or reloading

Status: VERIFIED WORKSFORME

(Core :: Layout: Positioned, defect)

Description

[Mats Palmgren (inactive)]

Spawned off from bug 63663 comment 30:

Fixed pos. block changes height when focusing a link or reloading

STEPS TO REPRODUCE:
1. Load URL (which is the 2nd testcase of bug 63663)
2. Middle-click on the link "Bug 97283"

ACTUAL RESULTS:
The height if the DIV is reduced to the height of the two scrollbar arrow
buttons.

PLATFORMS & BUILDS TESTED:
Bug occurs in 2004-08-05-10 trunk Linux
Bug does NOT occur in Mozilla 1.7 on Linux

Comment 1

[Mats Palmgren (inactive)]

The regression occured between 2004-05-25-06 -- 2004-06-01-05, there were no
other Linux nightlies between those builds...

Comment 2

[Boris Zbarsky [:bzbarsky]]

Hmm.. nothing in that range that should have affected reflow, offhand, so the
change is probably that we reflow at all?

Comment 3

[Boris Zbarsky [:bzbarsky]]

Well, there is the MEW-computation change dbaron made, but I don't see why it'd
affect this case.

Comment 4

[Martijn Wargers (dead)]

Well, I get a totally different regression date with
http://bugzilla.mozilla.org/attachment.cgi?id=145793&action=view (2nd testcase
of bug 63663)
I don't see it happening in:
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a2) Gecko/2004-07-10
Firefox/0.9.0+
But I see it happening in:
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a3) Gecko/2004-07-18
Firefox/0.9.1+

My guess would be that it is caused by the fix for bug 151375. Focusing seems to
cause a reflow since then. See also bug 252920.

Comment 5

[Ronald Tilby]

Mozilla Windows Trunk Nightly Build Regression Window
Pass: 2004071609
Fail: 2004071808

Comment 6

[Steve England [:stevee]]

Repo steps result in bug for me with Mozilla/5.0 (Windows; U; Windows NT 5.0;
en-US;rv:1.8b2) Gecko/20050422 Firefox/1.0+
Repo steps do not result in bug for me with Mozilla/5.0 (Windows; U; Windows NT
5.0; en-US;rv:1.8b2) Gecko/20050428 Firefox/1.0+
Bug 240276 probably fixed this, marking dependent & WFM