321231 - instanceof results for "literal" functions changed in FF 1.5

Status: RESOLVED DUPLICATE of bug 300079

(Core :: XUL, defect)

Description

[Thomas Blatter]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8) Gecko/20051111 Firefox/1.5
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8) Gecko/20051111 Firefox/1.5

Not sure if this is a bug or a feature, fact is that instanceof for literal functions has changed in FF 1.5 in xul-windows/scripts (this does not affect html documents/scripts)

Using:

function iof(o,c){alert(o instanceof c)}

iof(function(){},Object) old yields "true" xul1.5 "false"
iof(function(){},Function) old yields "true" xul1.5 "false"

(old here is mozilla 1.7.12 - html & xul - or ff 1.5-html, xul1.5 is ff 1.5-xul)

Note that js console behaves like 1.5-html

Reproducible: Always

Steps to Reproduce:
1. load xul and / or html testcases
2. click "test instanceof" button
3. compare alerts between xul / html, resp. versions of moz / ff

Actual Results:  
As mentioned above

Expected Results:  
Same behaviour in ff-1.5-xul as everywhere else, literal functions are Object's as well as Function's even in xul...

Comment 1

[Thomas Blatter]

Attachment: Testcase xul

Comment 2

[Thomas Blatter]

Attachment: Testcase html

Comment 3

[Bob Clary [:bc] (inactive)]

I can confirm the results that Thomas described. I don't think this is the JS Engine, but is XUL related. Moving there and confirming for now.

Comment 4

[Brendan Eich [:brendan]]

*** This bug has been marked as a duplicate of 300079 ***