Hide name/message from error property display, and generate a more accurate error message if a stacktrace is absent

lib/index.js

@@ -35,14 +35,18 @@ function renderError(err) {
 		message = stackLines[0];
 		stack = stackLines.slice(1);
 	} else {
-		message = err.message;
+		message = err.name + ": " + err.message;
 	}
 
 	var properties = Object.keys(err).map(function (key) {
-		return {
-			key: key,
-			value: err[key]
-		};
+		if (["name", "message"].indexOf(key) === -1) {
+			return {
+				key: key,
+				value: err[key]
+			};
+		}
+	}).filter(function (item) {
+		return item != null;
 	});
 
 	if (stack != null) {

src/index.js

@@ -34,15 +34,17 @@ function renderError(err) {
 		message = stackLines[0];
 		stack = stackLines.slice(1);
 	} else {
-		message = err.message;
+		message = `${err.name}: ${err.message}`;
 	}
 
 	let properties = Object.keys(err).map((key) => {
-		return {
-			key: key,
-			value: err[key]
-		};
-	});
+		if (["name", "message"].indexOf(key) === -1) {
+			return {
+				key: key,
+				value: err[key]
+			};
+		}
+	}).filter((item) => item != null);
 
 	if (stack != null) {
 		properties.push({

test.js

@@ -17,5 +17,7 @@ err.location = {
 		column: 31
 	}
 }
+err.name = "GrammarError";
+err.message = "Infinite loop detected.";
 
 logger.error(err);