310658 - When downloading files larger than 2G, the byte count wraps around to negative numbers.

Status: VERIFIED DUPLICATE of bug 228968

(Toolkit :: Downloads API, defect)

Description

[Seth Goodman]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7

It acts exactly as if the byte count were stored in a 32-bit signed integer. 
After you pass the 2G mark, the number goes negative and gradually approaches
zero.  While this is going on, the data transfer rate is also messed up, which
you would expect with a negative byte count.  Since DVD ISO images can be as
large as 4.7Gbytes, changing to a 32-bit unsigned integer would not fix this.  I
recommend changing the byte count to a 64-bit integer, signed or unsigned as you
need.

Reproducible: Always

Steps to Reproduce:
1. Download any file larger than 2Gbytes.
2. Watch what happens when you pass the 2Gbyte boundary in the download.
3.

Actual Results:  
See details above.

Expected Results:  
Continue to have positive increasing byte count for large files.

Comment 1

[O. Atsushi (Torisugari)]

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