15 Jan
2006
15 Jan
'06
12:03 p.m.
Below the signature is everything needed to reproduce the problem under GNU/Linux. I have checked the YAP sources, but did not succeed in finding what may cause this behavior. All the best,
Roberto
--
Prof. Roberto Bagnara
Computer Science Group
Department of Mathematics, University of Parma, Italy
http://www.cs.unipr.it/~bagnara/
mailto:bagnara@cs.unipr.it
$ cat bug.c
#include <Yap/YapInterface.h>
#include <limits.h>
YAP_Bool
long_min(YAP_Term t) {
return YAP_Unify(t, YAP_MkIntTerm(LONG_MIN));
}
YAP_Bool
yap_stub_long_min() {
YAP_Term arg1 = YAP_A(1);
return long_min(arg1);
}
void
init() {
YAP_UserCPredicate("long_min", (int(*)())(yap_stub_long_min), 1);
}
$ gcc -c -shared -fPIC bug.c
$ ld -shared -o bug.so bug.o
$ yap
% Restoring file /usr/local/lib/Yap/startup
YAP version Yap-5.1.0
?- load_foreign_files(['bug'],[],init).
yes
?- long_min(M).
M = -2147483648 ?
yes
?- long_min(M), M == -2147483648.
no
?- long_min(M), M = -2147483648.
no
?- long_min(M), M is 0 - 2147483648.
no
?- long_min(M), M1 is abs(M).
M = M1 = -2147483648 ?
yes
?- $