fix duplicate_term bug

2018-01-14 23:05:15 -07:00
parent 08b94dcdf5
commit a4022d569f
10 changed files with 60 additions and 32 deletions
--- a/src/prolog/iterators.rs
+++ b/src/prolog/iterators.rs
@@ -40,7 +40,8 @@ impl<'a> QueryIterator<'a> {
                let state = TermIterState::Clause(0, ClauseType::Catch, terms);
                QueryIterator { state_stack: vec![state] }
            },
-            &QueryTerm::Display(ref terms) => {
+            &QueryTerm::Display(ref terms)
+          | &QueryTerm::DuplicateTerm(ref terms) => {
                let state = TermIterState::Clause(0, ClauseType::Root, terms);
                QueryIterator { state_stack: vec![state] }
            },
@@ -292,7 +293,7 @@ impl<'a> ChunkedIterator<'a>
                    arity = 3;
                    break;
                },
-                &QueryTerm::Is(_) => {
+                &QueryTerm::Is(_) | &QueryTerm::DuplicateTerm(_) => {
                    result.push(term);
                    arity = 2;
                    break;