122346 - [RR][ABS POS]Absolutely positioned content looses BODY style when changing BODY styles using JS

Status: RESOLVED DUPLICATE of bug 88154

(Core :: CSS Parsing and Computation, defect)

Description

[Anders Korsvall]

BuildID:    2002012803

When changing BODY styles such as backgroundColor using  
document.body.style.backgroundColor='yellow', all text in absolutely positioned 
DIVs that does not use a specified style (body text) looses style and is 
rendered using default color, font etc.

Reproducible: Always
Steps to Reproduce:
1. Load the attached testcase
2. Click "Click to test"

Actual Results:  The text in the absolutely positioned DIV looses style and is 
rendered using the default font, color etc.

Expected Results:  The text in the absolutely positioned DIV should not change.

Comment 1

[Anders Korsvall]

Attachment: testcase

Comment 2

[Alexey Chernyak]

The styling of the DIV element is invalid (missing units of length), but
correcting that, doesn't fix it.

confirming.

Comment 3

[Anders Korsvall]

Attachment: corrected testcase

Fixed dimension units of the DIV to be px. As Alexey Chernyak noted, this does
not make the problem go away.

Comment 4

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

This is pretty clearly a problem with ReResolveStyleContext -- probably
misparenting of style contexts in some way.  The problem shows up on theme
change as well.

Comment 5

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

I have a fix for this.

*** This bug has been marked as a duplicate of 88154 ***