$a = 9223372036854775807;
$c = ++$a;
-print "not " unless $a == 9223372036854775808;
+print "not " unless $a == 9223372036854775808 && $c == $a;
print "ok 27\n";
$a = 9223372036854775807;
$c = $a + 1;
-print "not " unless $a == 9223372036854775808;
+print "not " unless $a == 9223372036854775807 && $c == 9223372036854775808;
print "ok 28\n";
$a = -9223372036854775808;
$c = $a--;
-print "not " unless $a == -9223372036854775809;
+print "not " unless $a == -9223372036854775809 && $c == -9223372036854775808;
print "ok 29\n";
$a = -9223372036854775808;
$c = --$a;
-print "not " unless $a == -9223372036854775809;
+print "not " unless $a == -9223372036854775809 && $c == $a;
print "ok 30\n";
$a = -9223372036854775808;
$c = $a - 1;
-print "not " unless $a == -9223372036854775809;
+print "not " unless $a == -9223372036854775808 && $c == -9223372036854775809;
print "ok 31\n";