List index out of range on scopeStack

[pyflakes-bot]

Original report by gozdal on Launchpad:

---

I am using flake8 on some Python code and after upgrading to 2.5.0 from 2.4.1 (which upgraded pyflakes) I started getting this error:

Traceback (most recent call last):
File "/home/gozdalik/.virtualenvs/starfish/bin/flake8", line 11, in
sys.exit(main())
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/flake8/main.py", line 33, in main
report = flake8_style.check_files()
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/flake8/engine.py", line 176, in check_files
return self._retry_serial(self._styleguide.check_files, paths=paths)
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/flake8/engine.py", line 167, in _retry_serial
return func(*args, **kwargs)
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pep8.py", line 1670, in check_files
self.input_dir(path)
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pep8.py", line 1706, in input_dir
runner(os.path.join(root, filename))
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/flake8/engine.py", line 121, in input_file
return fchecker.check_all(expected=expected, line_offset=line_offset)
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pep8.py", line 1412, in check_all
self.check_ast()
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pep8.py", line 1358, in check_ast
checker = cls(tree, self.filename)
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/flake8/_pyflakes.py", line 43, in init
withDoctest=self.withDoctest)
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pyflakes/checker.py", line 294, in init
self.handleChildren(tree)
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pyflakes/checker.py", line 567, in handleChildren
self.handleNode(node, tree)
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pyflakes/checker.py", line 609, in handleNode
handler(node)
File "/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pyflakes/checker.py", line 686, in GLOBAL
global_scope = self.scopeStack[global_scope_index]
IndexError: list index out of range

The code I'm running pyflakes on is proprietary so unfortunately I can't share it. Any idea how to help debugging this issue?

[pyflakes-bot]

Original comment by jayvdb (@jayvdb?) on Launchpad:

---

The relevant code was added in 03ffc76

And I am quite sure that "global_scope_index = 1 if self.withDoctest else 0" is wrong.

And #38 should fix the problem for you.

[pyflakes-bot]

Original comment by bitglue (@bitglue?) on Launchpad:

---

Can you reduce the code that causes the failure to a minimal example that you can share?

[pyflakes-bot]

Original comment by gozdal on Launchpad:

---

Do you have any tips how do I go doing that? From the stack it not obvious
to me which file is causing the problem.

wt., 3.11.2015 o 10:01 użytkownik Phil Frost napisał:

Can you reduce the code that causes the failure to a minimal example
that you can share?

--
You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/1512184

Title:
List index out of range on scopeStack

Status in Pyflakes:
New

Bug description:
I am using flake8 on some Python code and after upgrading to 2.5.0
from 2.4.1 (which upgraded pyflakes) I started getting this error:

Traceback (most recent call last):
File "/home/gozdalik/.virtualenvs/starfish/bin/flake8", line 11, in

sys.exit(main())
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/flake8/main.py",
line 33, in main
report = flake8_style.check_files()
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/flake8/engine.py",
line 176, in check_files
return self._retry_serial(self._styleguide.check_files, paths=paths)
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/flake8/engine.py",
line 167, in _retry_serial
return func(*args, **kwargs)
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pep8.py",
line 1670, in check_files
self.input_dir(path)
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pep8.py",
line 1706, in input_dir
runner(os.path.join(root, filename))
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/flake8/engine.py",
line 121, in input_file
return fchecker.check_all(expected=expected, line_offset=line_offset)
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pep8.py",
line 1412, in check_all
self.check_ast()
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pep8.py",
line 1358, in check_ast
checker = cls(tree, self.filename)
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/flake8/_pyflakes.py",
line 43, in init
withDoctest=self.withDoctest)
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pyflakes/checker.py",
line 294, in init
self.handleChildren(tree)
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pyflakes/checker.py",
line 567, in handleChildren
self.handleNode(node, tree)
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pyflakes/checker.py",
line 609, in handleNode
handler(node)
File
"/home/gozdalik/.virtualenvs/starfish/local/lib/python2.7/site-packages/pyflakes/checker.py",
line 686, in GLOBAL
global_scope = self.scopeStack[global_scope_index]
IndexError: list index out of range

The code I'm running pyflakes on is proprietary so unfortunately I
can't share it. Any idea how to help debugging this issue?

To manage notifications about this bug go to:
https://bugs.launchpad.net/pyflakes/+bug/1512184/+subscriptions

[pyflakes-bot]

Original comment by jayvdb (@jayvdb?) on Launchpad:

---

This is easy to reproduce -- the problem occurs whenever global is used in the module scope when self.withDoctest is enabled, because the use of self.withDoctest is very wrong in determining scope levels.

Create a file global_scope_bug.py containing only global foo, and enable doctests.

PYFLAKES_DOCTEST=1 PYTHONPATH=. python -m pyflakes global_scope_bug.py

And my patch does fix it, but I'll refresh it to add tests and a more detailed commit message.