Hi,
I am getting a compiler crash with the following code:
$ cat foo.pxd
cdef class Foo:
cdef public object x
$ cat foo.pyx
cdef class Foo
cdef class Foo:
pass
$ ./cython.py foo.pyx
Error compiling Cython file:
------------------------------------------------------------
...
cdef class Foo
^
------------------------------------------------------------
foo.pyx:1:5: Compiler crash in AnalyseDeclarationsTransform
ModuleNode.body = StatListNode(foo.pyx:1:0)
StatListNode.stats[0] = CClassDefNode(foo.pyx:1:5,
as_name = u'Foo',
class_name = u'Foo',
module_name = '',
visibility = 'private')
Compiler crash traceback from this point on:
File "/Users/alok/Downloads/repos/cython.git/Cython/Compiler/Visitor.py",
line 173, in _visit
return handler_method(obj)
File
"/Users/alok/Downloads/repos/cython.git/Cython/Compiler/ParseTreeTransforms.py",
line 1478, in visit_CClassDefNode
node.body.stats += stats
AttributeError: 'NoneType' object has no attribute 'stats'
The problem seems to be due to having a .pxd file with the attributes of
the cdef class in it. Since the attributes are declared "public", Cython
is trying to generate property code for "Foo.x". But it's trying to do
that at the point of forward declaration in the .pyx file, instead of the
definition of the class.
An easy fix seems to be to change
AnalyseDeclarationsTransform.visit_CClassDefNode in ParseTreeTransforms.py
to check for node.body not being none. I.e., the following patch seems to
work:
diff --git a/Cython/Compiler/ParseTreeTransforms.py
b/Cython/Compiler/ParseTreeTransforms.py
index f8c2efa..7811d56 100644
--- a/Cython/Compiler/ParseTreeTransforms.py
+++ b/Cython/Compiler/ParseTreeTransforms.py
@@ -1466,7 +1466,7 @@ if VALUE is not None:
def visit_CClassDefNode(self, node):
node = self.visit_ClassDefNode(node)
- if node.scope and node.scope.implemented:
+ if node.body and node.scope and node.scope.implemented:
stats = []
for entry in node.scope.var_entries:
if entry.needs_property:
Thanks,
Alok
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