[ python-Bugs-1472251 ] pdb 'run' crashes when the it's first argument is non-string

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Bugs item #1472251, was opened at 2006-04-18 12:16
Message generated for change (Comment added) made by jakamkon
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Category: Python Library
Group: Python 2.5
Status: Open
Resolution: None
Priority: 6
Submitted By: Kuba Kończyk (jakamkon)
Assigned to: Nobody/Anonymous (nobody)
Summary: pdb 'run' crashes when the it's first argument is non-string

Initial Comment:
Pdb 'run/runeval' commands fails to check the type of
given argument.When argument to 'run/runeval' is
non-string the functions crashes with further
impilications on (correctly)invoking this functions: 

Python 2.5a1 (trunk:45527, Apr 18 2006, 11:12:31)

>>> def x(): pass
>>> import pdb
>>> pdb.run(x())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/jkk/python/python-svn/Lib/pdb.py", line
1113, in run
    Pdb().run(statement, globals, locals)
  File "/home/jkk/python/python-svn/Lib/bdb.py", line
363, in run
    cmd = cmd+'\n'
TypeError: unsupported operand type(s) for +:
'NoneType' and 'str'
>>> pdb.run('x()')
> /home/jkk/python/python-svn/Lib/pdb.py(1113)run()
-> Pdb().run(statement, globals, locals)
(Pdb)
# CTRL-D pressed
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/jkk/python/python-svn/Lib/pdb.py", line
1113, in run
    Pdb().run(statement, globals, locals)
  File "/home/jkk/python/python-svn/Lib/pdb.py", line
1113, in run
    Pdb().run(statement, globals, locals)
  File "/home/jkk/python/python-svn/Lib/bdb.py", line
48, in trace_dispatch
    return self.dispatch_line(frame)
  File "/home/jkk/python/python-svn/Lib/bdb.py", line
67, in dispatch_line
    if self.quitting: raise BdbQuit
bdb.BdbQuit

The solution is to simply ensure that the first
argument passed to the 'run/runeval' functions is string.

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>Comment By: Kuba Kończyk (jakamkon)
Date: 2006-05-22 09:20

Message:
Logged In: YES 
user_id=1491175

The point is that when you want to invoke pdb.run correctly
(with string argument) after getting TypeError as in above
example,
your namespace is probably overwritten or deleted so that
you don't have access to previously defined symbols.

>>> def x():pass
>>> import pdb
>>> pdb.run(x())
TypeError
>>> pdb.run('x()')
> /home/jkk/python-svn/Lib/pdb.py(1122)run()
-> Pdb().run(statement, globals, locals)
(Pdb) pdb
*** NameError: name 'pdb' is not defined
(Pdb) x
*** NameError: name 'x' is not defined


----------------------------------------------------------------------

Comment By: Ilya Sandler (isandler)
Date: 2006-05-21 23:25

Message:
Logged In: YES 
user_id=971153


I would not classify your example as a crash. You passed a
wrong value (None in your case) into pdb.run() and got back
a TypeError...Isn't it an expected response?

E.g if you do:  >>>max(13)

You'll also get: "TypeError"


Am I missing something? Could you clarify?



----------------------------------------------------------------------

Comment By: Kuba Kończyk (jakamkon)
Date: 2006-04-18 12:36

Message:
Logged In: YES 
user_id=1491175

Patch is in #1472257

----------------------------------------------------------------------

You can respond by visiting: 
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