Bug 723075

Description of problem:
Downloading two RPMs from a koji scratch build, the first with -O and -J flags, and the second with none, seems to cause a segfault.  The relevant gdb session follows:

[9069] gholms@asbestos ~ % gdb /usr/bin/curl
GNU gdb (GDB) Fedora (7.2-51.fc14)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/curl...Reading symbols from /usr/lib/debug/usr/bin/curl.debug...done.
done.
(gdb) run -O -J 'http://koji.fedoraproject.org/koji/getfile?taskID=3208065&name=python26-boto-2.0-1.el5.noarch.rpm' 'http://koji.fedoraproject.org/koji/getfile?taskID=3208065&name=python26-boto-2.0-1.el5.src.rpm'
Starting program: /usr/bin/curl -O -J 'http://koji.fedoraproject.org/koji/getfile?taskID=3208065&name=python26-boto-2.0-1.el5.noarch.rpm' 'http://koji.fedoraproject.org/koji/getfile?taskID=3208065&name=python26-boto-2.0-1.el5.src.rpm'
[Thread debugging using libthread_db enabled]
[New Thread 0x7ffff214a700 (LWP 20924)]
[Thread 0x7ffff214a700 (LWP 20924) exited]
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  747k  100  747k    0     0   807k      0 --:--:-- --:--:-- --:--:--  854k
curl: Saved to filename 'python26-boto-2.0-1.el5.noarch.rpm'

Program received signal SIGSEGV, Segmentation fault.
0x0000000000405d74 in header_callback (ptr=<value optimized out>, size=<value optimized out>, 
    nmemb=<value optimized out>, stream=0x0) at main.c:4389
4389	        outs->filename = filename;
(gdb) bt
#0  0x0000000000405d74 in header_callback (ptr=<value optimized out>, size=<value optimized out>, 
    nmemb=<value optimized out>, stream=0x0) at main.c:4389
#1  0x000000343761a3b9 in Curl_client_write (conn=<value optimized out>, type=<value optimized out>, 
    ptr=0x62c120 "Content-Disposition: attachment; filename=python26-boto-2.0-1.el5.src.rpm\r\n", len=75)
    at sendf.c:487
#2  0x0000003437618f2f in Curl_http_readwrite_headers (data=0x623560, conn=0x62ddd0, nread=0x7fffffffd6d0, 
    stop_reading=0x7fffffffd6de) at http.c:3779
#3  0x000000343762c632 in readwrite_data (conn=0x62ddd0, done=0x7fffffffd78e) at transfer.c:455
#4  Curl_readwrite (conn=0x62ddd0, done=0x7fffffffd78e) at transfer.c:1004
#5  0x000000343762dd47 in Transfer (data=0x623560) at transfer.c:1367
#6  Curl_do_perform (data=0x623560) at transfer.c:2053
#7  0x000000000040890c in operate (argc=0, argv=<value optimized out>) at main.c:5358
#8  main (argc=0, argv=<value optimized out>) at main.c:5683

Version-Release number of selected component (if applicable):
curl-7.21.0-8.fc14.x86_64

How reproducible:
Seemingly only with these particular URIs

Steps to Reproduce:
1. curl -O -J 'http://koji.fedoraproject.org/koji/getfile?taskID=3208065&name=python26-boto-2.0-1.el5.noarch.rpm' 'http://koji.fedoraproject.org/koji/getfile?taskID=3208065&name=python26-boto-2.0-1.el5.src.rpm'
  
Actual results:
python26-boto-2.0-1.el5.noarch.rpm written to disk, segmentation fault

Expected results:
python26-boto-2.0-1.el5.noarch.rpm written to disk, binary garbage printed to screen

Additional info:
I realize that printing an RPM to the console is not very useful; I was simply learning by doing. ;)