Passing an invalid hostname (e.g. 'asdf') on the command line as a host to connect to causes a segfault. Ditto if an invalid hostname is entered in the 'connect' dialog in the GUI.
Works for me with x3270-3.2.19-4, XFree86-libs-4.3.0-2, glibc-2.3.2-5. Which versions are installed on your system ?
included <sys/time.h> instead of <time.h>, fixed in next release