Comment 15 for bug 381069

In case anyone wants to hack away at this, here is a relevant diff (pdb.py from Python 2.6.2 vs 2.5.2):

http://svn.python.org/view/python/tags/r262/Lib/pdb.py?r1=60915&r2=71601

As Minjae pointed out, the error is in the checkline() method. Unfortunately, I don't have a Python 2.6 installation to hack, but maybe someone could test this in pdb.py?

Replace:
    def checkline(self, filename, lineno):
        """Check whether specified line seems to be executable.

        Return `lineno` if it is, 0 if not (e.g. a docstring, comment, blank
        line or EOF). Warning: testing is not comprehensive.
        """
        line = linecache.getline(filename, lineno, self.curframe.f_globals)
        if not line:

with:
    def checkline(self, filename, lineno):
        """Check whether specified line seems to be executable.

        Return `lineno` if it is, 0 if not (e.g. a docstring, comment, blank
        line or EOF). Warning: testing is not comprehensive.
        """
        try:
            line = linecache.getline(filename, lineno, self.curframe.f_globals)
        except AttributeError:
            line = 0
        if not line: