correct misleading error for modules (#300)

2020-04-12 12:51:59 -06:00
parent 2ce4f602c0
commit 28099b9812
6 changed files with 106 additions and 22 deletions
--- a/src/prolog/machine/mod.rs
+++ b/src/prolog/machine/mod.rs
@@ -288,7 +288,11 @@ impl Machine {

            Ok(self.indices.insert_module(module))
        } else {
-            Err(SessionError::ModuleNotFound)
+            let err = ExistenceError::SourceSink(ModuleSource::File(
+                clause_name!("$toplevel"),
+            ));
+
+            Err(SessionError::ExistenceError(err))
        }
    }