🚀 go-pugleaf

Hi,

	I just downloaded gnuchess4.0 patch 62 and compiled it on
a Sun 3/80 running SunOS 4.1.  I got a crash (segmentation fault) while
playing a game.  My command line was:

		gnuchess 1 :20 1 :20

I then turned the book off with "book", and the following moves took place
(no rude comments about my chess skills please :) I was white) :

	1 d4  Nf6
	2 c4  d5
	3 Nc3 dc
	4 e4  Be6
	5 b3  >crash<

and after thinking about it for about 15 seconds, gnuchess crashed out
with a segmentation violation.  The fault was reproducible.  Using a
debugger I think I have traced the problem to the file genmoves.c line 331
in which the variable TrP has taken on a value that cannot be dereferenced.
Not knowing the gnuchess code at all I guess it's being stomped on by
something.

My Makefile options were:

BOOKTYPE=small.book.data
LCURSES=-lcurses -ltermcap
OPT= -DCACHE -DGDX -DHASGETTIMEOFDAY -DHISTORY -DNULLMOVE \
	 -DOLDTIME -DQUIETBACKGROUND -DSEMIQUIETBOOKGEN

#[note:  the previous was not broken into two lines in the Makefile]

CC= gcc -g -W $(OPT)
CFLAGS=  -g -O2 -funroll-loops -traditional-cpp  # gnu cc  2.00 on SunOS


Is this a well known bug?  If so, is there a patch.