New issue 2878: ctypes array instance does not support assignment operation of
its element created by method "from_buffer"
https://bitbucket.org/pypy/pypy/issues/2878/ctypes-array-instance-does-not-support
Sheng Zou:
Code snippet:
```
#!python
>>>> from ctypes import *
>>>> class SomeArray(Array):
.... _type_ = c_uint16
.... _size_ = 32
>>>> x = SomeArray()
>>>> x[0] = 1 # This is OK
>>>> x[0] = c_uint16(1) # This is OK
>>>> x[0] = c_uint16.from_buffer(bytearray("\x01\x00")) # Not OK, see error
>>>> below
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File
"/Users/local/Downloads/pypy-c-jit-95034-d2dd59afa85c-osx64/lib_pypy/_ctypes/array.py",
line 211, in __setitem__
if ensure_objects(cobj) is not None:
File
"/Users/local/Downloads/pypy-c-jit-95034-d2dd59afa85c-osx64/lib_pypy/_ctypes/basics.py",
line 15, in ensure_objects
return ensure()
File
"/Users/local/Downloads/pypy-c-jit-95034-d2dd59afa85c-osx64/lib_pypy/_ctypes/primitive.py",
line 396, in _ensure_objects
assert self._objects is None
AssertionError
```
PyPy version: pypy-c-jit-95034-d2dd59afa85c-osx64/bin/pypy
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