Ticket #4: foolscap-copiedremoteexception.patch

foolscap/call.py

@@ -766 +766 @@
         state['parents'] = obj.parents
         return state
 
+
+class CopiedRemoteException(Exception):
+    """I represent an exception thrown on the remote end
+    (real Exception, old-style instance, or string),
+    I am a base class for locally reconstructed Exceptions.
+    You can catch me in a try block if you want.
+    """ 
+
 class CopiedFailure(failure.Failure, copyable.RemoteCopyOldStyle):
     # this is a RemoteCopyOldStyle because you can't raise new-style
     # instances as exceptions.
@@ -821 +829 @@
 
         assert isinstance(self.type, str)
         typepieces = self.type.split(".")
-        class ExceptionLikeString:
+        class ExceptionLikeString(CopiedRemoteException):
             pass
         self.type = ExceptionLikeString
         self.type.__module__ = ".".join(typepieces[:-1])