100% reproducible segfault when I attempt to use gpg --decrypt on this file.  It
requires my secret key so I cannot upload this example for reproduction.

gnupg-1.4.2-3.1

[warren@caprica cards]$ gdb gpg
GNU gdb Red Hat Linux (6.3.0.0-1.94rh)
Copyright 2004 Free Software Foundation, Inc.
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welcome to change it and/or distribute copies of it under certain conditions.
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This GDB was configured as "i386-redhat-linux-gnu"...Using host libthread_db
library "/lib/libthread_db.so.1".

(gdb) run --decrypt boacheck.asc
Starting program: /usr/bin/gpg --decrypt boacheck.asc
Reading symbols from shared object read from target memory...done.
Loaded system supplied DSO at 0x111000

Program received signal SIGSEGV, Segmentation fault.
ctermid (s=0x0) at ../sysdeps/posix/ctermid.c:35
35        return strcpy (s, "/dev/tty");
(gdb) bt
#0  ctermid (s=0x0) at ../sysdeps/posix/ctermid.c:35
#1  0x008bd430 in tty_get_ttyname () at ttyio.c:103
#2  0x008bd4e7 in init_ttyfp () at ttyio.c:160
#3  0x008bd818 in tty_printf (fmt=0x8de32e "\n") at ttyio.c:223
#4  0x00865919 in passphrase_to_dek (keyid=0xbfd19a60, pubkey_algo=16,
cipher_algo=3, s2k=0x82ed430, mode=0,
    tryagain_text=0x0, canceled=0xbfd19a80) at passphrase.c:888
#5  0x008668a7 in check_secret_key (sk=0x82ed3f8, n=3) at seckey-cert.c:82
#6  0x0082e582 in get_seckey (sk=0x82ed3f8, keyid=0x82eadd0) at getkey.c:497
#7  0x008641c6 in get_session_key (k=0x82eadd0, dek=0xb7f14584) at pubkey-enc.c:84
#8  0x00833a27 in proc_pubkey_enc (c=0x82eac60, pkt=0x82eacb8) at mainproc.c:405
#9  0x008379ed in do_proc_packets (c=0x82eac60, a=0x82e6b30) at mainproc.c:1243
#10 0x00837c77 in proc_encryption_packets (anchor=0x0, a=0x82e6b30) at
mainproc.c:1152
#11 0x0087015f in decrypt_message (filename=0xbfd1b9e8 "boacheck.asc") at
decrypt.c:86
#12 0x00825468 in main (argc=1, argv=0xbfd1a17c) at g10.c:3182
(gdb)