add exception error prelude.

2017-08-18 12:44:04 -06:00
parent 02c0f1cf56
commit 502f498114
1 changed files with 1 additions and 1 deletions
--- a/src/prolog/io.rs
+++ b/src/prolog/io.rs
@@ -404,7 +404,7 @@ Each predicate must have the same name and arity.";
 }

 fn error_string(e: &String) -> String {
-    format!("error: {}", e)
+    format!("error: exception thrown: {}", e)
 }

 pub fn print(wam: &mut Machine, result: EvalSession) {