[PDB] NameError in list comprehension in PDB

[DiaaJad]

BPO	27316
Nosy	@birkenfeld

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2016-06-14.14:53:27.817>
created_at = <Date 2016-06-14.07:40:48.406>
labels = ['type-bug', 'library']
title = '[PDB] NameError in list comprehension in PDB'
updated_at = <Date 2016-06-14.14:53:27.816>
user = 'https://bugs.python.org/DiaaJad'

bugs.python.org fields:

activity = <Date 2016-06-14.14:53:27.816>
actor = 'SilentGhost'
assignee = 'none'
closed = True
closed_date = <Date 2016-06-14.14:53:27.817>
closer = 'SilentGhost'
components = ['Library (Lib)']
creation = <Date 2016-06-14.07:40:48.406>
creator = 'Diaa Jad'
dependencies = []
files = []
hgrepos = []
issue_num = 27316
keywords = []
message_count = 3.0
messages = ['268539', '268542', '268561']
nosy_count = 3.0
nosy_names = ['georg.brandl', 'SilentGhost', 'Diaa Jad']
pr_nums = []
priority = 'normal'
resolution = 'works for me'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue27316'
versions = ['Python 3.4']

[DiaaJad]

This code fails in the python debugger:
(Pdb) z = True
(Pdb) p [x for x in [1,2] if z]
*** NameError: name 'z' is not defined

While the same code works in the interactive shell:
>>> [x for x in [1,2] if z]
[1, 2]

[SilentGhost]

I cannot reproduce this issue on 3.5, do you have a chance to test this on a 3.5 or some other version of python? Also, could you provide any more details of your system?

[DiaaJad]

I actually drop to pdb from nosetests on test failure using --pdb option. I use a Fedora 23 machine.
Anyway, it looks like this issue is specific to the virtual environment we use at work that uses version 3.4.4, as I couldn't reproduce it on native 3.4 .
As this bug does not show up in the original release I think we can safely close the ticket and I will try to debug the issue locally.