Improved error handling and formatting

Now prints lua backtraces on callback errors as well.  This could be
controlled with LUA_BACKTRACE or just RUST_BACKTRACE or similar.

1 files changed, 9 insertions, 2 deletions

diff --git a/src/error.rs b/src/error.rs
index a5c2ed8..490e1c6 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -30,8 +30,15 @@ error_chain! {
     }
 
     errors {
-        ScriptError(err: String)
-        IncompleteStatement(err: String)
+        ScriptError(err: String) {
+            display("Error executing lua script {}", err)
+        }
+        CallbackError(err: String) {
+            display("Error during lua callback {}", err)
+        }
+        IncompleteStatement(err: String) {
+            display("Incomplete lua statement {}", err)
+        }
     }
 
     foreign_links {