New issue 2453: PyObject_GetBuffer Regression
https://bitbucket.org/pypy/pypy/issues/2453/pyobject_getbuffer-regression
eric s:
There's a regression in PyObject_GetBuffer between 5.3.x and 5.4.x, and still
appearing in 5.6.x, noticed in testing on the Pillow project. The core failure
is "TypeError: PyPy does not yet implement the new buffer interface" when
passing a string into PyObject_GetBuffer.
The following reproduction is the clearest Pillow code, but due to a lack of
catching the error, it continues and later throws a different error.
Using either Pillow 3.4.2 or current master, the following code succeeds in 5.3
but not in 5.4
```
#!python
from PIL import ImagePath
import array
arr = array.array("f", [0, 1])
p = ImagePath.Path(arr.tostring())
```
The line where this code diverges is in Pillow's _imaging.c,
```
if (PyObject_CheckBuffer(buffer)) {
return PyObject_GetBuffer(buffer, view, PyBUF_SIMPLE);
}
```
This call succeeds in 5.3 and fails in 5.4, returning a -1. It succeeds in
CPython 2.7.
This is a travis run triggering this bug:
https://travis-ci.org/python-pillow/Pillow/jobs/184160459
Pillow is working around this by actually handling the error:
https://github.com/python-pillow/Pillow/pull/2294
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