diff --git a/kernel_build.py b/kernel_build.py
index 8edf11cf67e3b52214151420b03f53dd84c1c4d9..4b92ee2b8dd801a82953d6eb6fa798c16895426a 100755
--- a/kernel_build.py
+++ b/kernel_build.py
@@ -53,16 +53,18 @@ class Reporter:
 
 
     def report_build_warning(self, filename, regex, details):
+        report = {}
+
         if len(details) == 0 or filename is None:
-            return None
+            return report
 
         if not os.path.exists(os.path.join(self.path, filename)):
-            return None
+            return report
 
         line = details[0]
         try:
             warning = re.search(regex, line).group(0)
-        except:
+        except GetBuildWaringErr as e:
             print('Except>>>', details)
             return