Handle config error in load config file.

sanic/config.py

@@ -1,6 +1,8 @@
 import os
 import types
 
+from sanic.exceptions import PyFileError
+
 
 SANIC_PREFIX = 'SANIC_'
 
@@ -83,6 +85,9 @@ class Config(dict):
         except IOError as e:
             e.strerror = 'Unable to load configuration file (%s)' % e.strerror
             raise
+        except Exception as e:
+            raise PyFileError(filename) from e
+
         self.from_object(module)
         return True
 

sanic/exceptions.py

@@ -223,6 +223,11 @@ class InvalidRangeType(ContentRangeError):
     pass
 
 
+class PyFileError(Exception):
+    def __init__(self, file):
+        super().__init__('could not execute config file %s', file)
+
+
 @add_status_code(401)
 class Unauthorized(SanicException):
     """