[Cython] Compiler crash in RemoveUnreachableCode

[Stefan Behnel]

Andriy Kornatskyy, 20.01.2014 22:16:
> May be that issue is namespace package related? Both (wheezy.http and dependent wheezy.core) use namespace_packages directive in setuptools.

No, I think it's a problem with importing in Cython compiled modules. ISTM
that some extension modules got "reloaded", i.e. their module dict got
cleared and they got reinitialised, thus recreating all global objects that
other modules had already imported (and still keep a reference to).


> Here is another bug (details below):
> 
> 1. virtualenv env
> 2. env/bin/easy_install cython
> 3. env/bin/easy_install lxml wheezy.core
> 
> It seems to have an issue while trying to install 2 or more libs at once.
> ...
> Installed env/lib/python2.7/site-packages/lxml-3.3.0beta5-py2.7-macosx-10.9-x86_64.egg
> Processing dependencies for lxml
> Finished processing dependencies for lxml
> Searching for wheezy.core
> Reading https://pypi.python.org/simple/wheezy.core/
> Best match: wheezy.core 0.1.129
> Downloading https://pypi.python.org/packages/source/w/wheezy.core/wheezy.core-0.1.129.tar.gz#md5=ea3d5f744bc0525d61f9fb48d897972d
> Processing wheezy.core-0.1.129.tar.gz
> Writing /var/folders/g8/2kym1h8n7qbgrwg4qkfqw1gw0000gn/T/easy_install-UC_pgJ/wheezy.core-0.1.129/setup.cfg
> Running wheezy.core-0.1.129/setup.py -q bdist_egg --dist-dir /var/folders/g8/2kym1h8n7qbgrwg4qkfqw1gw0000gn/T/easy_install-UC_pgJ/wheezy.core-0.1.129/egg-dist-tmp-9sntQ1
> Traceback (most recent call last):
> ...
>   File “env/lib/python2.7/site-packages/Cython-0.20-py2.7-macosx-10.9-x86_64.egg/Cython/Compiler/ModuleNode.py", line 109, in process_implementation
>     self.generate_c_code(env, options, result)
>   File "env/lib/python2.7/site-packages/Cython-0.20-py2.7-macosx-10.9-x86_64.egg/Cython/Compiler/ModuleNode.py", line 302, in generate_c_code
>     rootwriter = Code.CCodeWriter(emit_linenums=emit_linenums, c_line_in_traceback=options.c_line_in_traceback)
>   File "Code.py", line 1406, in Cython.Compiler.Code.CCodeWriter.__init__ (/var/folders/g8/2kym1h8n7qbgrwg4qkfqw1gw0000gn/T/easy_install-JVXbGE/Cython-0.20/Cython/Compiler/Code.c:30697)
> 
>   File "env/lib/python2.7/site-packages/Cython-0.20-py2.7-macosx-10.9-x86_64.egg/Cython/StringIOTree.py", line 11, in __init__
>     stream = StringIO()
> TypeError: 'NoneType' object is not callable

Looks like the same thing.

Stefan