harden reporting against failures for objects which break when dir() is called on them.

IPython/ultraTB.py

@@ -60,7 +60,7 b' You can implement other color schemes easily, the syntax is fairly'
 self-explanatory. Please send back new schemes you develop to the author for
 possible inclusion in future releases.
 
-$Id: ultraTB.py 951 2005-12-25 00:57:24Z fperez $"""
+$Id: ultraTB.py 954 2005-12-26 19:40:50Z fperez $"""
 
 #*****************************************************************************
 #       Copyright (C) 2001 Nathaniel Gray <[e-mail]>
@@ -550,7 +550,18 b' class VerboseTB(TBTools):'
         exception = ['%s%s%s: %s' % (Colors.excName, etype_str,
                                      ColorsNormal, evalue_str)]
         if type(evalue) is types.InstanceType:
-            names = [w for w in dir(evalue) if isinstance(w, basestring)]
+            try:
+                names = [w for w in dir(evalue) if isinstance(w, basestring)]
+            except:
+                # Every now and then, an object with funny inernals blows up
+                # when dir() is called on it.  We do the best we can to report
+                # the problem and continue
+                _m = '%sException reporting error (object with broken dir())%s:'
+                exception.append(_m % (Colors.excName,ColorsNormal))
+                etype_str,evalue_str = map(str,sys.exc_info()[:2])
+                exception.append('%s%s%s: %s' % (Colors.excName,etype_str,
+                                     ColorsNormal, evalue_str))
+                names = []
             for name in names:
                 value = text_repr(getattr(evalue, name))
                 exception.append('\n%s%s = %s' % (indent, name, value))

doc/ChangeLog

@@ -1,5 +1,8 b''
 2005-12-26  Fernando Perez  <[e-mail]>
 
+	* IPython/ultraTB.py (VerboseTB.text): harden reporting against
+	failures for objects which break when dir() is called on them.
+
 	* IPython/FlexCompleter.py (Completer.__init__): Added support for
 	distinct local and global namespaces in the completer API.  This
 	change allows us top properly handle completion with distinct