[ python-Bugs-1014215 ] Unspecific errors with metaclass

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Bugs item #1014215, was opened at 2004-08-23 11:33
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Category: Python Interpreter Core
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Thomas Heller (theller)
Assigned to: Nobody/Anonymous (nobody)
Summary: Unspecific errors with metaclass

Initial Comment:
Metaclass errors give only unspecific tracebacks.
The attached sample, with Python 2.3:

Traceback (most recent call last):
  File "mc.py", line 10, in ?
    class Z(X, Y):
TypeError: Cannot create a consistent method resolution
order (MRO) for bases X, Y

With Python 2.4, it prints:

Traceback (most recent call last):
  File "mc.py", line 10, in ?
    class Z(X, Y):
TypeError: Error when calling the metaclass.
Make sure the base arguments are valid.


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