# HG changeset patch
# User Sylvain Thénault <sylvain.thenault@logilab.fr>
# Date 1285757051 -7200
# Node ID 1b5fc8581437c2574def34783542819152257ed5
# Parent  843684a50e4808a474daee3a919c5efdec5d9b58
[c-c] fix RuntimeError: 'maximum recursion depth exceeded while calling a Python object' we get when creating/upgrading/shelling an instance: hasattr() call __getattribute__, creating an infinite recursion error catched by the interpretor. Avoid this by testing the method is available on the class instead of the instance

diff -r 843684a50e48 -r 1b5fc8581437 migration.py
--- a/migration.py	Wed Sep 29 12:18:06 2010 +0200
+++ b/migration.py	Wed Sep 29 12:44:11 2010 +0200
@@ -129,7 +129,8 @@
             return object.__getattribute__(self, name)
         except AttributeError:
             cmd = 'cmd_%s' % name
-            if hasattr(self, cmd):
+            # search self.__class__ to avoid infinite recursion
+            if hasattr(self.__class__, cmd):
                 meth = getattr(self, cmd)
                 return lambda *args, **kwargs: self.interact(args, kwargs,
                                                              meth=meth)