450974 - ASSERTION: non-root frame's desired size changed during an incremental reflow with large margin and height

Status: NEW

(Core :: Layout, defect)

Description

[Martijn Wargers (dead)]

Attachment: testcase

See testcase, which shows these assertions in current debug trunk build:
###!!! ASSERTION: non-root frame's desired size changed during an incremental re
flow: '(target == rootFrame && size.height == NS_UNCONSTRAINEDSIZE) || (desiredS
ize.width == size.width && desiredSize.height == size.height)', file c:/mozilla-
build-1.3/mozilla-central/layout/base/nsPresShell.cpp, line 6334
###!!! ASSERTION: Negative height passed to nsWindow::Resize: '(aHeight >=0 )',
file c:/mozilla-build-1.3/mozilla-central/widget/src/windows/nsWindow.cpp, line
2037

Comment 1

[Martijn Wargers (dead)]

Attachment: testcase2

I guess the assertions are also related to the painting bug that I see in this case.
Keep zooming in to the max with this testcase, then reset the zoom level.

Comment 2

[Martin Mokrejs]

Martijn, maybe same as bug #366791?

Comment 3

[Martijn Wargers (dead)]

Could be, no idea.

Comment 4

[Mats Palmgren (inactive)]

Attachment: testcase3

A HTML variant of layout/xul/base/src/crashtests/464407-1.xhtml
which triggers this assertion with the patch in bug 776265.

Comment 5

[Mats Palmgren (inactive)]

I think all these tests triggers the same underlying bug.
It appears to be caused by reflowing a ScrollbarFrame for
a box with -moz-box-sizing:border-box .