23979 - many pages loaded twice or don't show up at all

Status: VERIFIED DUPLICATE of bug 22203

(Core :: Internationalization, defect, P3)

Description

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

DESCRIPTION:  I've noticed recently (the past week or two) that many pages are
loaded when I load them.  In particular:
 * every bugzilla form I submit is submitted twice (although the second time is
without the POST data, so I get an error instead of a double-submission)
 * the bugzilla query page is loaded twice, after it's been loaded a first time

I have traced this problem to the following line in my prefs.js file:
user_pref("intl.charset.detector", "ruprob");
If I remove the line, the bug goes away.

STEPS TO REPRODUCE:
 * add the above line to your prefs.js
 * load http://bugzilla.mozilla.org/query.cgi
 * hit reload

ACTUAL RESULTS:
 * the page begins reloading - the page background becomes visible and the form
controls show up, and then it disappears again and loads a second time

EXPECTED RESULTS:
 * it should only load once.

DOES NOT WORK CORRECTLY ON:
 * Linux, mozilla, 2000-01-13-13-M13

ADDITIONAL INFORMATION:
I still haven't tested that removing the line fixes the problem for form
submission.  (I have for the query page.)  I'll test on this bug and report the
results.

Comment 1

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

There's a third case where I see this reliably:
 * the javascript URL that I bookmarked from http://bugzilla.mozilla.org/ that
allows me to enter a mozilla bug #.  What happens is that I see the dialog box
asking for the bug number twice.  Removing the pref fixes this problem.

Comment 2

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Removing the pref also fixes the form submission problem.  So, they all seem to
be the same problem.

I don't know how many people have this pref set, but I didn't set it myself, so
some copy of the browser must have done it.

Comment 3

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

This pref was also causing the problem I've been seeing recently that pages
often don't show up, and I have to hit reload to get a page to show up.  My
earlier testing had confused me into thinking that that was a separate bug, but
I don't think it is.

This pref is generally harmful.  If it's not supported anymore, then it
shouldn't trigger anything, because some people still have it in their prefs.js
files.

I'm changing this to 'major'.  This was preventing my DOGFOOD use of the browser
for a week (when I didn't have time to investigate the bug).

Comment 4

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Code containing the string "ruprob" is in the files:

/intl/chardet/src/nsCyrillicDetector.cpp
/intl/chardet/src/nsCharDetModule.cpp
/intl/chardet/tests/DetectCharset.cpp

Comment 5

[Frank Tang]

This pref should be set by change the "Auto Detect" menu. I have not heard
anyone else have the problem that this pref got set by the browser.
By design, the page may load twice if you set that pref. The first time
load with default charset, and the 2nd time load with detected charset.
It won't load twice if the detected charset are the same as the
default. Howerver, we should fix the submit problem.

Comment 6

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

I was probably fiddling with the Auto Detect menu for one page - I didn't think
it would set a permanent pref, but rather, expected it only to effect the one
page I was viewing.

Comment 7

[Frank Tang]

Change platform and OS to ALL

Comment 8

[Teruko Kobayashi]

Added beta1.

Comment 9

[Frank Tang]

ok, this is a problem with the refresh when auto detect code is on. Mark it dup 
of 22203

*** This bug has been marked as a duplicate of 22203 ***

Comment 10

[Alan S. Jones]

Verified dupe of 22203 "Refreshing page after set Auto-detect"