Subclass TruncationError from RuntimeError

Author: ricardoV94

pymc/exceptions.py

@@ -76,5 +76,5 @@ def __init__(self, message, actual=None, expected=None):
             super().__init__(message)
 
 
-class TruncationError(Exception):
+class TruncationError(RuntimeError):
     """Exception for errors generated from truncated graphs"""