84571 - old content in cache is not replaced, but is overwritten with new.

Status: RESOLVED DUPLICATE of bug 79983

(Core :: Networking: Cache, defect)

Description

[Alexey Chernyak]

sometimes when you browse a page, and the page changes, gets shorter, when you
continue browsing, and then click Back button to return to that page, you see
new content with old content appended to it at the bottom. Viewsource for the
page shows old page with it's beginning overwritten with new page.

My guess is this affects Memory cache, because I haven't seen this problem span
different browsing sessions, But I might be wrong.

To Reproduce:
1. Put a large page on the web.
2. Go to http://validator.w3.org/
3. Fill the address of your page in and tick "Show source input"
4. Click Validate and let the page load.
5. Make the original that page you put on the web smaller.
6. Repeat steps 2-4 except don't tick "Show source input"
7. On the validation results page click on "check it for validity" link.
8. Click Back button and observe the results page, you will see old source
following the end of the new results.

Comment 1

[Chris Hiner]

Dup of Bug 79983?

Comment 2

[Alexey Chernyak]

Attachment: screenshot

Comment 3

[Alexey Chernyak]

indeed is

*** This bug has been marked as a duplicate of 79983 ***