add missing ! in int_pow (#580)

2020-06-11 22:28:05 -06:00
parent d9de38b935
commit 5ffb4597b3
1 changed files with 1 additions and 1 deletions
--- a/src/prolog/machine/arithmetic_ops.rs
+++ b/src/prolog/machine/arithmetic_ops.rs
@@ -472,7 +472,7 @@ impl MachineState {
                }
            }
            (Number::Fixnum(n1), Number::Integer(n2)) => {
-                if (n1 == 1 || n1 == 0 || n1 == -1) && &*n2 < &0 {
+                if !(n1 == 1 || n1 == 0 || n1 == -1) && &*n2 < &0 {
                    let n = Number::from(n1);
                    let stub = MachineError::functor_stub(clause_name!("^"), 2);