It seems when you have a program that uses curses getch(), then change
the size of your xterm, getch() returns 0 and not ERR (-1).  This only
happens some of the time.  Most of the time, the program will dump core
inside of the getch() call.  getch() is defined as wgetch(stdsrc).

---From gdb---
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.
#0  0x40037067 in resizeterm ()
(gdb) bt
#0  0x40037067 in resizeterm ()
#1  0x4003d085 in _nc_update_screensize ()
#2  0x40033804 in doupdate ()
#3  0x4002f457 in wrefresh ()
#4  0x40032480 in _nc_synchook ()
#5  0x40027eca in wechochar ()
#6  0x4002b044 in wgetch ()
#7  0x804a2e4 in domenu ()
#8  0x804a045 in main ()
#9  0x4006ccb3 in __libc_start_main (main=0x8049e24 <main>, argc=1,
argv=0xbffffcf4, init=0x8048c58 <_init>,
    fini=0x804b0ec <_fini>, rtld_fini=0x4000a350 <_dl_fini>,
stack_end=0xbffffcec)
    at ../sysdeps/generic/libc-start.c:78
(gdb)


The returning of 0 doesn't appear to follow what the man page curs_getch.3x
says should happen when signals are sent.  Regardless, the function call
dumps core most of the time when a SIGWINCH is sent.

standard RedHat 6.0
egcs-1.1.2-12
glibc-2.1.1-6
ncurses-4.2-18