add copy_term/3 (#232)

2019-11-29 00:44:23 -07:00
parent 335202b9d9
commit 9c9c484ee4
8 changed files with 81 additions and 23 deletions
--- a/src/prolog/machine/machine_state.rs
+++ b/src/prolog/machine/machine_state.rs
@@ -729,7 +729,7 @@ pub(crate) trait CallPolicy: Any {
                return_from_clause!(machine_st.last_call, machine_st)
            }
            &BuiltInClauseType::CopyTerm => {
-                machine_st.copy_term();
+                machine_st.copy_term(AttrVarPolicy::DeepCopy);
                return_from_clause!(machine_st.last_call, machine_st)
            }
            &BuiltInClauseType::Eq => {