Internal Python error in the inspect module

[ipython]

Original Launchpad bug 249548: https://bugs.launchpad.net/ipython/+bug/249548
Reported by: harry666t (harry666t).

I was toying with IPython, and I've observed this bug:

[1]: def foo(a, (x,y,z) = (1,2,3)): print a, x, y, z
...: 

[2]: foo(1,2)
ERROR: Internal Python error in the inspect module.
Below is the traceback from this internal error.

Traceback (most recent call last):
File "/var/lib/python-support/python2.5/IPython/ultraTB.py", line 662, in text
  locals,formatvalue=var_repr))
File "/usr/lib/python2.5/inspect.py", line 812, in formatargvalues
  specs.append(strseq(args[i], convert, join))
File "/usr/lib/python2.5/inspect.py", line 765, in strseq
  return join(map(lambda o, c=convert, j=join: strseq(o, c, j), object))
File "/usr/lib/python2.5/inspect.py", line 765, in <lambda>
  return join(map(lambda o, c=convert, j=join: strseq(o, c, j), object))
File "/usr/lib/python2.5/inspect.py", line 767, in strseq
  return convert(object)
File "/usr/lib/python2.5/inspect.py", line 809, in convert
  return formatarg(name) + formatvalue(locals[name])
KeyError: 'x'

IPython's exception reporting continues...

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)

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

/home/harry/<ipython console> in foo(***failed resolving arguments***)

TypeError: 'int' object is not iterable
> <ipython console>(1)foo()

ipdb> 

The regular Python interpreter just says:

>>> def foo(a, (x,y,z) = (1,2,3)):
...     print a, x, y, z
... 
>>> foo(1,2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 1, in foo
TypeError: 'int' object is not iterable

This seems to be related to some IPython-specific functionality, although I have no understanding of its internals... I don't know if this error even matters at all, since there's already another one related to passing wrong arguments to a function - I'm just making sure someone knows that there's badness in that "inspect" module...

[ipython]

[ LP comment 1 by: Fernando Perez, on 2008-07-18 00:28:19+00:00 ]

On Thu, Jul 17, 2008 at 10:51 AM, harry666t harry666t@gmail.com wrote:

Public bug reported:

I was toying with IPython, and I've observed this bug:

[1]: def foo(a, (x,y,z) = (1,2,3)): print a, x, y, z
...:

ERROR: Internal Python error in the inspect module.
Below is the traceback from this internal error.

Great, thanks! I'd never had a reproducible test to cause this
failure. Having one now makes it possible to actually track the bug
down.

Best,

f

[takluyver]

This seems to have been fixed in trunk.

[minrk]

Yes, this is fixed in 0.11