[Python-projects] ZeroDivisionError with pylint

[MATSUI Tetsushi]

Hello,

I've told that pylint stops with ZeroDivisionError for one of the
files in my project.  I haven't tried to minimize the test case,
but here is the traceback I get:

Traceback (most recent call last):
  File "/Users/tetsushi/Gentoo/usr/bin/pylint", line 4, in <module>
    lint.Run(sys.argv[1:])
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 901, in __init__
    linter.check(args)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 492, in check
    self.check_astng_module(astng, checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 602, in check_astng_module
    if implements(checker, IASTNGChecker)])
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 619, in astng_events
    self.astng_events(child, checkers, _reversed_checkers)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/lint.py", line 616, in astng_events
    checker.visit(astng)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/utils.py", line 84, in visit
    method(node)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/pylint/checkers/typecheck.py", line 167, in visit_assign
    function_node = safe_infer(node.expr.node)
  File "/Users/tetsushi/Gentoo//usr/lib/python2.5/site-packages/pylint/checkers/utils.py", line 44, in safe_infer
    inferit.next()
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 45, in wrapped
    for res in _func(node, context, **kwargs):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 298, in infer_getattr
    for owner in self.expr.infer(context):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 45, in wrapped
    for res in _func(node, context, **kwargs):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/__init__.py", line 122, in _infer_stmts
    for infered in stmt.infer(context):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 45, in wrapped
    for res in _func(node, context, **kwargs):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/__init__.py", line 122, in _infer_stmts
    for infered in stmt.infer(context):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 45, in wrapped
    for res in _func(node, context, **kwargs):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 280, in infer_callfunc
    for infered in callee.infer_call_result(self, context):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 500, in infer_call_result_function
    for infered in returnnode.value.infer(context):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 45, in wrapped
    for res in _func(node, context, **kwargs):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/__init__.py", line 122, in _infer_stmts
    for infered in stmt.infer(context):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 45, in wrapped
    for res in _func(node, context, **kwargs):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/__init__.py", line 122, in _infer_stmts
    for infered in stmt.infer(context):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 45, in wrapped
    for res in _func(node, context, **kwargs):
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 454, in _infer_operator
    value = impl(lhsvalue, rhsvalue)
  File "/Users/tetsushi/Gentoo/usr/lib/python2.5/site-packages/logilab/astng/inference.py", line 479, in <lambda>
    return _infer_operator(self, context=context, impl=lambda a,b: a/b, meth='__div__')
ZeroDivisionError: integer division or modulo by zero


The file is elliptic.py in NZMATH-0.90.0 (downloadable at
http://download.sourceforge.net/nzmath/NZMATH-0.90.0.tar.gz).

The versions I'm using:
pylint 0.14
astng 0.17.2
logilab-common 0.31.0


Thank you in advance.
-- 
MATSUI "Fe2+" Tetsushi