644084 - crash [@ nsAccessNodeWrap::get_attributesForNames(unsigned short, unsigned short**, short*, unsigned short**)]

Status: VERIFIED FIXED

(Core :: Disability Access APIs, defect)

Description

[Marco Zehe (:MarcoZ)]

This bug was filed from the Socorro interface and is 
report bp-fa75b724-d2f2-47d6-bd60-5746b2110323 .
============================================================= 
I found this while trying to reproduce reports that JAWS and Window-Eyes do not work with Firefox 4 under Windows XP. While JAWS virtual cursor simply doesn't work, running Window-Eyes with Firefox 4 produces this crash reliably.

This is isolated to Windows XP, does not happen on Windows 7.

Comment 1

[alexander :surkov (:asurkov)]

Attachment: patch

regression from bug 541618 (http://hg.mozilla.org/releases/mozilla-2.0/diff/117fe7a234cc/accessible/src/msaa/nsAccessNodeWrap.cpp#l1.152)

Comment 2

[Marco Zehe (:MarcoZ)]

Comment on attachment 521134 [details] [diff] [review]
patch

r=me. This fixes the initial crash on startup, and a first page comes up in WE with the virtual buffer working. However, then activating a link to go to any other page causes another crash. Unfortunately, I can't debug this since my XP is not a good install really and debugging always means a freezing screen reader so i can't work the VStudio UI. So there seem to be other parts of the code that react badly on XP now somehow.

Comment 3

[David Bolter [:davidb] (NeedInfo me for attention)]

Do we have a stack for the comment 2 case?

Comment 4

[alexander :surkov (:asurkov)]

(In reply to comment #3)
> Do we have a stack for the comment 2 case?

it sounds crashreported is switched off on local builds (perhaps it doesn't make sense at all in this case), and Marco can use VS (per comment 2) to get it locally.

Comment 5

[alexander :surkov (:asurkov)]

Attachment: patch to land

Comment 6

[alexander :surkov (:asurkov)]

landed - http://hg.mozilla.org/mozilla-central/rev/8547ac6aefb7

Comment 7

[Marco Zehe (:MarcoZ)]

Verified fixed in ▪Build-Identifikator: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.2a1pre) Gecko/20110329 Firefox/4.2a1pre (but actually running on XP of course, not as shwon here on Windows 7)