[Pan-devel] Download time/size estimate broken/negative Was: I need to check and/or request three features

[Duncan]

Rob posted on Thu, 31 Jul 2014 08:52:30 -0700 as excerpted:

> and while we are on the subject of PAN problems, sometime a few months
> back the estimated download time and size display became broken,
> displaying wildly errratic and sometime huge negative numbers in the
> display.  Grab 100 or so RAR files and block save them.  Then add 100 or
> so more to the queue while processing the first batch.  You should see
> really bogus values on the download status window.  Thing is, this used
> to work flawlessly, but now does not...and I cannot trace it to a change
> in PAN itself, but possibly a change in a third party support library?

That sounds like a signed/unsigned long-int bug, with sizes overflowing 
into the signed-bit.  Are you perhaps running 32-bit pan and regularly 
queuing for download > 2 GiB worth at a time?

64-bit long-long-ints shouldn't be running into that issue yet (and for 
several more years anyway =:^), so if it's happening with 64-bit pan (and 
thus 64-bit libs), it's either something else or we've a rather 
interesting bug indeed, but queuing 2+ GiB of downloads and triggering a 
signed-int-overflow bug on 32-bit is very possible, even likely if the 
code hasn't been adjusted for that possibility yet, and that would 
explain why this is the first report of it I've seen on the pan lists as 
well, since I'd guess most users are 64-bit these days, at least those 
doing serious binary downloading.

And in addition to 32-bit/64-bit, what distro are you running, and are 
you building pan yourself (from git or tarball) or using the distro 
supplied version?  And while I've not verified, I'm guessing that would 
be gmime functionality, so what version(s) of gmime/libgmime are you 
running and distro-supplied or self-built?

(For comparison, tho I don't do too much with binaries and likely 
wouldn't have seen this bug, here's that info for me:

Gentoo/~amd64 so 64-bit, pan built from live-git from the commit visible 
in my headers since I'm posting with it via gmane, gmime-2.6.20 from 
gentoo.)

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
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