When I run pacman -Su, I get a segmentation fault. It is reproducible. Here is what is produced as output:

[root@bobzomer bruno]# pacman -Su
:: perl-xml-simple: local (2.14-3) appears to be newer than repo (extra/2.14-2)
:: Above packages will be skipped. To manually upgrade use 'pacman -S <pkg>'

Targets: getmail-4.6.4-1 jack-audio-connection-kit-0.102.20-1

Total Package Size: 0.3 MB

Proceed with upgrade? [Y/n]

:: Retrieving packages from extra...
warning: failed to get filesize for getmail-4.6.4-1.pkg.tar.gz

failed downloading getmail-4.6.4-1.pkg.tar.gz from ftp.belnet.be: 550 getmail-4.6.4-1.pkg.tar.gz: No such file or directory


warning: failed to get filesize for jack-audio-connection-kit-0.102.20-1.pkg.tar.gz

failed downloading jack-audio-connection-kit-0.102.20-1.pkg.tar.gz from ftp.belnet.be: 550 jack-audio-connection-kit-0.102.20-1.pkg.tar.gz: No such file or directory


connect: Connection refused
error: cannot connect to archlinux.antesis.org
connect: Connection refused
error: cannot connect to archlinux.antesis.org
*** glibc detected *** pacman: double free or corruption (fasttop): 0x085d78c0 ***
======= Backtrace: =========
/lib/libc.so.6[0x400ab750]
/lib/libc.so.6(__libc_free+0x84)[0x400acda4]
pacman[0x80604ee]
pacman[0x805b731]
pacman[0x805bdeb]
pacman[0x80523c6]
pacman[0x8055335]
/lib/libc.so.6(__libc_start_main+0xd8)[0x4005d808]
pacman[0x804a0a1]
======= Memory map: ========
08048000-0806b000 r-xp 00000000 03:05 663971 /usr/bin/pacman
0806b000-0806c000 rw-p 00023000 03:05 663971 /usr/bin/pacman
0806c000-085f2000 rw-p 0806c000 00:00 0 [heap]
40000000-4001a000 r-xp 00000000 03:05 194323 /lib/ld-2.4.so
4001a000-4001b000 r--p 00019000 03:05 194323 /lib/ld-2.4.so
4001b000-4001c000 rw-p 0001a000 03:05 194323 /lib/ld-2.4.so
4001c000-4001d000 r-xp 4001c000 00:00 0 [vdso]
4001d000-40021000 rw-p 4001d000 00:00 0
40021000-40029000 r-xp 00000000 03:05 194376 /lib/libnss_files-2.4.so
40029000-4002b000 rw-p 00007000 03:05 194376 /lib/libnss_files-2.4.so
4002b000-4002f000 r-xp 00000000 03:05 194362 /lib/libnss_dns-2.4.so
4002f000-40031000 rw-p 00003000 03:05 194362 /lib/libnss_dns-2.4.so
40031000-40033000 rw-p 40031000 00:00 0
40036000-40047000 r-xp 00000000 03:05 341891 /usr/lib/libz.so.1.2.3
40047000-40048000 rw-p 00011000 03:05 341891 /usr/lib/libz.so.1.2.3
40048000-40162000 r-xp 00000000 03:05 194324 /lib/libc-2.4.so
40162000-40164000 r--p 00119000 03:05 194324 /lib/libc-2.4.so
40164000-40166000 rw-p 0011b000 03:05 194324 /lib/libc-2.4.so
40166000-4016a000 rw-p 40166000 00:00 0
40182000-40190000 r-xp 00000000 03:05 194361 /lib/libresolv-2.4.so
40190000-40192000 rw-p 0000d000 03:05 194361 /lib/libresolv-2.4.so
40192000-40194000 rw-p 40192000 00:00 0
40194000-4019e000 r-xp 00000000 03:05 342206 /usr/lib/libgcc_s.so.1
4019e000-4019f000 rw-p 00009000 03:05 342206 /usr/lib/libgcc_s.so.1
40200000-40221000 rw-p 40200000 00:00 0
40221000-40300000 ---p 40221000 00:00 0
bfc97000-bfcad000 rw-p bfc97000 00:00 0 [stack]
Aborted


I launch pacman with gdb to have a backtrace, but since I didn't recompile it with debugging symbol, I have no idea of the true name of fonctions in pacman source. The only thing I see is that the backtrace is different from previous pacman segfault bug report (16 frames instead of 10).

(gdb) bt
#0 0x4001c410 in __kernel_vsyscall ()
#1 0x40070731 in raise () from /lib/libc.so.6
#2 0x40071e29 in abort () from /lib/libc.so.6
#3 0x400a5cfb in __libc_message () from /lib/libc.so.6
#4 0x400ab750 in malloc_printerr () from /lib/libc.so.6
#5 0x400acda4 in free () from /lib/libc.so.6
#6 0x080604ee in ?? ()
#7 0x085d78c0 in ?? ()
#8 0xbf9b9028 in ?? ()
#9 0xbf9be148 in ?? ()
#10 0x0805b731 in ?? ()
#11 0x085d78c0 in ?? ()
#12 0x08068114 in _IO_stdin_used ()
#13 0x08072560 in ?? ()
#14 0xbf9c02e8 in ?? ()
#15 0x085d4720 in ?? ()
#16 0x00000000 in ?? ()