Nmap Development: Nmap 3.25 `pt->down_this_block > 0' assertion failure

[Hank Leininger <hlein () progressive-comp com>]

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On 2003-04-20, Fyodor <fyodor () insecure org> wrote:

> o Fixed (I hope) problem where Nmap would abort, complaining that
>   "Assertion `pt->down_this_block > 0' failed".  Thanks to
>   ray () 24hoursecurity org and mugz () x-mafia com for reporting and
>   helping me debug this problem.
Notsomuch ;(  My first attempt running 3.25 against a substantial target
list (several class B's) of mostly-firewalled hosts resulted in the
above assertion failure.  I attempted to reproduce it (just reran with
exactly the same options); nmap apparently got a hundred or so hosts
further, and then segfaulted.  Doh.

Unfortunately I had ulimit -c 0'ed, and have not had the time /
opportunity to reproduce since then; fell back to 3.00.  Next I will try
to make sure it'll produce a core, and/or run with --packet_trace to
make a more useful bug report than "it broke", but I figured it was
useful anyway to know the above fix wasn't enough :(

Thanks,

Hank Leininger <hlein () progressive-comp com>
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