This happened when opening a mailbox, on a RedHat 6.2 system:
This GDB was configured as "i386-redhat-linux"...
Core was generated by `/usr/local/bin/mutt'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/lib/libncurses.so.4...done.
Reading symbols from /lib/libc.so.6...done.
Reading symbols from /lib/ld-linux.so.2...done.
Reading symbols from /lib/libnss_files.so.2...done.
Reading symbols from /usr/lib/gconv/ISO8859-1.so...done.
#0 strcmp (p1=0x6164612d <Address 0x6164612d out of bounds>,
p2=0x81814a0 "<[EMAIL PROTECTED]>") at
../sysdeps/generic/strcmp.c:38
38 ../sysdeps/generic/strcmp.c: No such file or directory.
(gdb) bt
#0 strcmp (p1=0x6164612d <Address 0x6164612d out of bounds>,
p2=0x81814a0 "<[EMAIL PROTECTED]>")
at ../sysdeps/generic/strcmp.c:38
#1 0x80867f6 in mutt_strcmp (a=0x6164612d <Address 0x6164612d out of bounds>,
b=0x81814a0 "<[EMAIL PROTECTED]>")
at lib.c:544
#2 0x8062090 in hash_insert (table=0x8624948,
key=0x81814a0 "<[EMAIL PROTECTED]>",
data=0x8181350, allow_dup=0) at hash.c:79
#3 0x806cdd1 in mx_update_context (ctx=0x8626110) at mx.c:1457
#4 0x806739f in mbox_parse_mailbox (ctx=0x8626110) at mbox.c:363
#5 0x8067520 in mbox_open_mailbox (ctx=0x8626110) at mbox.c:421
#6 0x806bf86 in mx_open_mailbox (path=0xbfffeda0 "[mailbox location]",
flags=0, pctx=0x0) at mx.c:639
#7 0x805746f in mutt_index_menu () at curs_main.c:977
#8 0x8066b53 in main (argc=1, argv=0xbffff984) at main.c:709
Adam