[Cython] Cython 0.16 RC 1

[Wes McKinney]

On Thu, Apr 12, 2012 at 10:38 AM, mark florisson
<markflorisson88 at gmail.com> wrote:
> Yet another release candidate, this will hopefully be the last before
> the 0.16 release. You can grab it from here:
> http://wiki.cython.org/ReleaseNotes-0.16
>
> There were several fixes for the numpy attribute rewrite, memoryviews
> and fused types. Accessing the 'base' attribute of a typed ndarray now
> goes through the object layer, which means direct assignment is no
> longer supported.
>
> If there are any problems, please let us know.
> _______________________________________________
> cython-devel mailing list
> cython-devel at python.org
> http://mail.python.org/mailman/listinfo/cython-devel

I'm unable to build pandas using git master Cython. I just released
pandas 0.7.3 today which has no issues at all with 0.15.1:

http://pypi.python.org/pypi/pandas

For example:

16:57 ~/code/pandas  (master)$ python setup.py build_ext --inplace
running build_ext
cythoning pandas/src/tseries.pyx to pandas/src/tseries.c

Error compiling Cython file:
------------------------------------------------------------
...
        self.store = {}

        ptr = <int32_t**> malloc(self.depth * sizeof(int32_t*))

        for i in range(self.depth):
            ptr[i] = <int32_t*> (<ndarray> label_arrays[i]).data
                                                          ^
------------------------------------------------------------

pandas/src/tseries.pyx:107:59: Compiler crash in AnalyseExpressionsTransform

ModuleNode.body = StatListNode(tseries.pyx:1:0)
StatListNode.stats[23] = StatListNode(tseries.pyx:86:5)
StatListNode.stats[0] = CClassDefNode(tseries.pyx:86:5,
    as_name = u'MultiMap',
    class_name = u'MultiMap',
    doc = u'\n    Need to come up with a better data structure for
multi-level indexing\n    ',
    module_name = u'',
    visibility = u'private')
CClassDefNode.body = StatListNode(tseries.pyx:91:4)
StatListNode.stats[1] = StatListNode(tseries.pyx:95:4)
StatListNode.stats[0] = DefNode(tseries.pyx:95:4,
    modifiers = [...]/0,
    name = u'__init__',
    num_required_args = 2,
    py_wrapper_required = True,
    reqd_kw_flags_cname = '0',
    used = True)
File 'Nodes.py', line 342, in analyse_expressions:
StatListNode(tseries.pyx:96:8)
File 'Nodes.py', line 342, in analyse_expressions:
StatListNode(tseries.pyx:106:8)
File 'Nodes.py', line 5903, in analyse_expressions:
ForInStatNode(tseries.pyx:106:8)
File 'Nodes.py', line 342, in analyse_expressions:
StatListNode(tseries.pyx:107:21)
File 'Nodes.py', line 4767, in analyse_expressions:
SingleAssignmentNode(tseries.pyx:107:21)
File 'Nodes.py', line 4872, in analyse_types:
SingleAssignmentNode(tseries.pyx:107:21)
File 'ExprNodes.py', line 7082, in analyse_types:
TypecastNode(tseries.pyx:107:21,
    result_is_used = True,
    use_managed_ref = True)
File 'ExprNodes.py', line 4274, in analyse_types:
AttributeNode(tseries.pyx:107:59,
    attribute = u'data',
    initialized_check = True,
    is_attribute = 1,
    member = u'data',
    needs_none_check = True,
    op = '->',
    result_is_used = True,
    use_managed_ref = True)
File 'ExprNodes.py', line 4360, in analyse_as_ordinary_attribute:
AttributeNode(tseries.pyx:107:59,
    attribute = u'data',
    initialized_check = True,
    is_attribute = 1,
    member = u'data',
    needs_none_check = True,
    op = '->',
    result_is_used = True,
    use_managed_ref = True)
File 'ExprNodes.py', line 4436, in analyse_attribute:
AttributeNode(tseries.pyx:107:59,
    attribute = u'data',
    initialized_check = True,
    is_attribute = 1,
    member = u'data',
    needs_none_check = True,
    op = '->',
    result_is_used = True,
    use_managed_ref = True)

Compiler crash traceback from this point on:
  File "/home/wesm/code/repos/cython/Cython/Compiler/ExprNodes.py",
line 4436, in analyse_attribute
    replacement_node = numpy_transform_attribute_node(self)
  File "/home/wesm/code/repos/cython/Cython/Compiler/NumpySupport.py",
line 18, in numpy_transform_attribute_node
    numpy_pxd_scope = node.obj.entry.type.scope.parent_scope
AttributeError: 'TypecastNode' object has no attribute 'entry'
building 'pandas._tseries' extension
creating build
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/pandas
creating build/temp.linux-x86_64-2.7/pandas/src
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -O2 -fPIC
-I/home/wesm/epd/lib/python2.7/site-packages/numpy/core/include
-I/home/wesm/epd/include/python2.7 -c pandas/src/tseries.c -o
build/temp.linux-x86_64-2.7/pandas/src/tseries.o
pandas/src/tseries.c:1:2: error: #error Do not use this file, it is
the result of a failed Cython compilation.
error: command 'gcc' failed with exit status 1


-----

I kludged this particular line in the pandas/timeseries branch so it
will build on git master Cython, but I was treated to dozens of
failures, errors, and finally a segfault in the middle of the test
suite. Suffice to say I'm not sure I would advise you to release the
library in its current state until all of this is resolved. Happy to
help however I can but I'm back to 0.15.1 for now.

- Wes