Fail faster.

Author: sfdctaka

lib/util/helper.js

@@ -90,11 +90,13 @@ function getKomaciReport(ruleFilename, fileName, sourceFile) {
         }
     );
 
-    eslintReports = eslintReports.filter((diagnostic) => {
-        if (!diagnosticMessage) {
-            return false;
-        }
+    if (!diagnosticMessage) {
+        // No matching diagnostic message was found. Return an empty array to indicate that
+        // there is no lint warning/error to report back to the caller.
+        return [];
+    }
 
+    eslintReports = eslintReports.filter((diagnostic) => {
         return diagnostic.code.value === diagnosticMessage[1].code;
     });