Prevent %debug from not working if pydb 1.17 is installed, which has a fatal bug

IPython/Debugger.py

@@ -15,7 +15,7 b' details on the PSF (Python Software Foundation) standard license, see:'
 
 http://www.python.org/2.2.3/license.html
 
-$Id: Debugger.py 2155 2007-03-19 00:45:51Z fperez $"""
+$Id: Debugger.py 2203 2007-04-04 05:08:36Z fperez $"""
 
 #*****************************************************************************
 #
@@ -51,7 +51,9 b' has_pydb = False'
 prompt = 'ipdb> '
 try:
     import pydb
-    if hasattr(pydb.pydb, "runl"):
+    if hasattr(pydb.pydb, "runl") and pydb.version>'1.17':
+        # Version 1.17 is broken, and that's what ships with Ubuntu Edgy, so we
+        # better protetct against it.
         has_pydb = True
         from pydb import Pdb as OldPdb
 except ImportError:

IPython/iplib.py

@@ -6,7 +6,7 b' Requires Python 2.3 or newer.'
 
 This file contains all the classes and helper functions specific to IPython.
 
-$Id: iplib.py 2201 2007-04-03 05:59:01Z fperez $
+$Id: iplib.py 2203 2007-04-04 05:08:36Z fperez $
 """
 
 #*****************************************************************************
@@ -61,7 +61,7 b' from pprint import pprint, pformat'
 
 # IPython's own modules
 import IPython
-from IPython import OInspect,PyColorize,ultraTB
+from IPython import Debugger,OInspect,PyColorize,ultraTB
 from IPython.ColorANSI import ColorScheme,ColorSchemeTable  # too long names
 from IPython.FakeModule import FakeModule
 from IPython.Itpl import Itpl,itpl,printpl,ItplNS,itplns
@@ -1444,14 +1444,10 b' want to merge them back into the new files.""" % locals()'
             error('No traceback has been produced, nothing to debug.')
             return
 
-        have_pydb = False
         # use pydb if available
-        try:
+        if Debugger.has_pydb:
             from pydb import pm
-            have_pydb = True
-        except ImportError:
-            pass
-        if not have_pydb:
+        else:
             # fallback to our internal debugger
             pm = lambda : self.InteractiveTB.debugger(force=True)
         self.history_saving_wrapper(pm)()

doc/ChangeLog

@@ -1,3 +1,11 b''
[phone]  Fernando Perez  <[e-mail]>
+
+	* IPython/Debugger.py: disable the use of pydb version 1.17.  It
+	has a critical bug (a missing import that makes post-mortem not
+	work at all).  Unfortunately as of this time, this is the version
+	shipped with Ubuntu Edgy, so quite a few people have this one.  I
+	hope Edgy will update to a more recent package.
+
 2007-04-02  Fernando Perez  <[e-mail]>
 
 	* IPython/iplib.py (_prefilter): close #52, second part of a patch