229685 - trying to go back I get: "The file <file> cannot be found. Please check the location and try again."

Status: VERIFIED DUPLICATE of bug 123662

(Core :: DOM: Navigation, defect)

Description

[Casey Muller]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6b) Gecko/20031208
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6b) Gecko/20031208

Sporadically but fairly frequently I observe the following behavior:

- I'm at a valid webpage, http://host/path/foo.html
- I click on a link that takes me to http://host/path/bar.html
- I try to go back either with the button or keyboard, and get the message:
"The file /path/bar.html cannot be found. Please check the location and try
again." This pops up each time I try to go back, no matter the method.

At this point I can click on other links and they work fine, but after coming
back twice I observe the same inability on the same URL. I can use the drop down
on the back button to go back to pages behind it and that works fine (but not
one). If I then try to go forward to the page that's been blocked from the
front, I get the same error message. If however, I navigate to the blocked page
from another link, or type in the URL directly, I don't have any problems, and
it doesn't consistently happen with the same URLs.

So it seems like it somehow thinks that the page is a local file? That error
message is the same as if I enter file://nonexistantfile/

There seems to be some correlation with the page I'm coming back from (file2 in
the above example) being a POST form, but I've definitely observed it with
normal pages as well. I also suspected for a while it was only relative URLs,
but again it happened with absolute URLs too.

Sorry if this is a duplicate, I can't find an existing one.

This won't be that helpful since it's not consistent, but the site where I'm
experiencing the problem right now is: http://fantasygames.sportingnews.com/hoops/

Reproducible: Sometimes

Steps to Reproduce:
1. Browse normally
2. Try to go back.
Actual Results:  
If the bug occurs, a popup error will come up and say:
"The file <file> cannot be found. Please check the location and try again."

Expected Results:  
Gone back to http://<host>/<file>

Comment 1

[Casey Muller]

whoops, make that third tick mark say foo.html instead of bar.html:

"The file /path/foo.html cannot be found. Please check the location and try
again."

Comment 2

[Boris Zbarsky [:bzbarsky]]

Do you have any extensions installed?

Comment 3

[Casey Muller]

I don't think so, but can't google a way to check for sure; I didn't install any
explicitly after using the net installer.

I'm using the Modern theme, and about:plugins shows only the null plugin. Is it
worth changing to the Classic theme and seeing if the problem continues to occur?

Comment 4

[Boris Zbarsky [:bzbarsky]]

No, the theme should not affect this...  Are you using a proxy?

What's needed here is a reliable way to reproduce the bug....

Comment 5

[Casey Muller]

No, no proxy.

The problem appeared right after I upgraded to 1.6b, keeping my old profile
unchanged. 

I can't even get it to reliably reproduce locally, but it happens once or twice
a week and is somewhat bothersome, which is why I reported it. If nobody else
has seen it, perhaps it's worth waiting and if any other cases crop up we can
see what similarities exist.

Comment 6

[Christian :Biesinger (don't email me, ping me on IRC)]

*** This bug has been marked as a duplicate of 123662 ***

Comment 7

[Henrik Skupin [:whimboo][⌚️UTC+1]]

verified.