bug fixes on LCO, backtracking.

2017-12-10 01:24:23 -07:00
parent e44ad111c5
commit 37f4450c34
9 changed files with 107 additions and 106 deletions
--- a/src/prolog/fixtures.rs
+++ b/src/prolog/fixtures.rs
@@ -279,7 +279,7 @@ impl<'a> VariableFixtures<'a>
    {
        for term_ref in head.breadth_first_iter() {
            match term_ref {
-                TermRef::Var(_, cell, _) => {
+                TermRef::Var(Level::Shallow, cell, _) => {
                    unsafe_vars.remove(&cell.get().norm());
                },
                _ => {}