279995 - download manager miscalculates KB downloaded and average speed of download due to a wrap around error

Status: VERIFIED DUPLICATE of bug 228968

(Toolkit :: Downloads API, defect)

Description

[Clark]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0

When downloading files larger than ~2gigs. It appears that that the variable in
the download manager that holds the size of the file downloaded; wraps around
and all of a sudden you are on the negative side of a signed variable.  This
also messes up the calculation of the download speed since you are now dividing
by a negative number.

Reproducible: Always

Steps to Reproduce:
1.Connect to an ftp with a file larger than 2gigs (DVD ISOs work well)
2.Start downloading the file and open the download manager.
3.Wait for wrap around error to occur.

Actual Results:  
The numbers displayed for kilobytes downloaded and current download speed are
now negative.

Expected Results:  
It should continue to correctly display size downloaded and current download speeds.

Comment 1

[Jeff Walden [:Waldo]]

*** This bug has been marked as a duplicate of 228968 ***