447802 - Scrolling on very long pages stops working part of the way down

Status: RESOLVED DUPLICATE of bug 215055

(Firefox :: General, defect)

Description

[Daniel Thaler]

User-Agent:       Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.1) Gecko/2008071722 (Gentoo) Firefox/3.0.1
Build Identifier: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.1) Gecko/2008071722 (Gentoo) Firefox/3.0.1

Scroll down the given page; it is sourcecode and has line numbers. Everything will work fine, until line 1000 or thereabouts comes into view.
After that only a norrow strip along the top and bottom of the window will update correctly, while the middle of the window will continue to display content from further up.
This appears to be a redrawing problem: if I switch to another tab or window and back again, the window gets redrawn correctly (once, it breaks again immediately).

I have disabled all addons and tested both with and without smooth scrolling and have always seen the problem.
The problem is also not unique to the given URL, I'd already seen it elsewhere, but I ignored it because I was hoping it was a one-off thing.


Reproducible: Always

Steps to Reproduce:
1.open http://github.com/clivecrous/vultures/tree/master/vultures/vultures_map.c
2.scroll past source line 1000
3.see brokenness

Comment 1

[Sylvain Pasche]

looks like bug 215055

Comment 2

[Daniel Thaler]

It is. That's exactly what I'm seeing