443391 - setInterval/setTimeout pass random parameter to callback

Status: RESOLVED DUPLICATE of bug 394769

(Firefox :: General, defect)

Description

[Tom Adler]

User-Agent:       Opera/9.50 (X11; Linux i686; U; en)
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.14) Gecko/20080419 Ubuntu/8.04 (hardy) Firefox/2.0.0.14

Both 2.0.0.14 on linux and 3.0 on windows have same problem. Enter string "javascript:void(setInterval(alert, 3000))" in address bar and press <Enter> or "Go" button. This will call alert function every 3 seconds. Function called will receive random numeric value as a parameter in firefox, while other major browsers do not pass any parameters to this function. This quirk is not documented here: http://developer.mozilla.org/en/docs/DOM:window.setInterval 

Reproducible: Always

Steps to Reproduce:
1. Open any page in firefox.
2. Enter string "javascript:void(setInterval(alert, 3000))" in address bar and press <Enter> or "Go" button 
Actual Results:  
Alert dialogs appear one after one, displaying random numbers.

Expected Results:  
Alert dialogs should display 'undefined' or empty string.

Comment 1

[John P Baker]

see bug 394769 comment #2

Duplicate of bug 394769 ... or Bug 10637

Comment 2

[Tom Adler]

Looks like that