192037 - {inc}position: absolute and bottom: 0 sometimes positioned too high (reflow?)

Status: RESOLVED DUPLICATE of bug 175364

(Core :: Layout: Positioned, defect)

Description

[Taral]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.3b) Gecko/20030203
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.3b) Gecko/20030203

Sometimes when a page using position: absolute and bottom: 0 comes up, the block
in question is positioned too high in its containing block. I suspect reflow
because it goes away if you force the page to rerender from cache and it appears
that it only happens when the browser is fed the data slowly from the server.

Reproducible: Sometimes

Steps to Reproduce:
1. View URL.
2. Look at bottom left of page
3. Link in box should be at bottom-left, flush with right-hand box.

Comment 1

[Madhur Bhatia]

Taral, could u provide a reduced testcase showing the problem. 
The link at the bottom left in the url provided sems to be placed fine.

Comment 2

[Taral]

No, I can't. It depends on the rate at which the server generates the data. A
reduced testcase would almost certainly not invoke incremental reflow, which I
suspect is the problem.

Comment 3

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Sometimes a clever testcase can be written by dynamically generating some of the
content in question.

Comment 4

[Taral]

Attachment: Screenshot of the problem

I can try for a testcase, but this is an example of the problem. Reflow has not
moved the absolutely positioned element even though the containing box was
resized due to the image data coming in.

Comment 5

[Taral]

Attachment: Testcase derived from screenshot

This testcase appears to exhibit the reflow bug every time.

Comment 6

[Boris Zbarsky [:bzbarsky]]

Dup of the bug on not moving abs pos content when placeholders move.

Comment 7

[Taral]

Does anyone have the bug number to dupe this to? I'd like to track it...

Comment 8

[Boris Zbarsky [:bzbarsky]]

If I did, I would have marked this duplicate.

Comment 9

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

*** This bug has been marked as a duplicate of 175364 ***