[IPython-user] Cannot step debugger in IPython 0.9.1 under Python 2.6.2: Pdb instance has no attribute 'curframe'

[Jon Olav Vik]

I cannot step into scripts with "run -d"; ipython halts before the
first line with "Pdb instance has no attribute 'curframe'". It fails
even when debugging very simple files and with no user-specific
customizations loaded, no .bash_profile and no PYTHONPATH, in a
pristine directory so none of my files should override any defaults.
"run" without -d option works. Plain Python also works as usual.

I'm not sure when this problem arose, but it may have been after an
upgrade from the versions included with Ubuntu 8.04 (Python 2.5.2 and
IPython 0.8.1? wild guess).

Any help would be greatly appreciated.

Best regards,
Jon Olav


-bash-3.00$ ipython
/global/apps/python/2.6.2/lib/python2.6/site-packages/ipython-0.9.1-py2.6.egg/IPython/Magic.py:38:
DeprecationWarning: the sets module is deprecat
 from sets import Set
Python 2.6.2 (r262:71600, Apr 27 2009, 23:59:28)
Type "copyright", "credits" or "license" for more information.

IPython 0.9.1 -- An enhanced Interactive Python.

[...]

In [1]: cat debug_me.py
"""Check if the IPython debugger has problems"""

x = 2 + 2
print x / 0

In [2]: run -d debug_me.py
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)

/home/jonvi/<ipython console> in <module>()

/global/apps/python/2.6.2/lib/python2.6/site-packages/ipython-0.9.1-py2.6.egg/IPython/iplib.pyc
in ipmagic(self, arg_s)
   951         else:
   952             magic_args = self.var_expand(magic_args,1)
--> 953             return fn(magic_args)
   954
   955     def ipalias(self,arg_s):

/global/apps/python/2.6.2/lib/python2.6/site-packages/ipython-0.9.1-py2.6.egg/IPython/Magic.pyc
in magic_run(self, parameter_s, runner)
  1613                     maxtries = 10
  1614                     bp = int(opts.get('b',[1])[0])
-> 1615                     checkline = deb.checkline(filename,bp)
  1616                     if not checkline:
  1617                         for bp in range(bp+1,bp+maxtries+1):

/global/apps/python/2.6.2/lib/python2.6/pdb.pyc in checkline(self,
filename, lineno)
   450         line or EOF). Warning: testing is not comprehensive.
   451         """
--> 452         line = linecache.getline(filename, lineno,
self.curframe.f_globals)
   453         if not line:
   454             print >>self.stdout, 'End of file'

AttributeError: Pdb instance has no attribute 'curframe'