[issue14203] bytearray_getbuffer: unnecessary code

[Stefan Krah]

New submission from Stefan Krah <stefan-usenet at bytereef.org>:

bytearray_getbuffer() checks for view==NULL. But this has never been
allowed:

PEP: "The second argument is the address to a bufferinfo structure.
      Both arguments must never be NULL."

DOCS (3.2): "view must point to an existing Py_buffer structure
             allocated by the caller".


A quick grep through the source tree shows no instances where
the middle argument of either PyObject_GetBuffer of bf_getbuffer
is NULL or 0.


Patch attached, all tests pass. I wouldn't be comfortable to
commit it without review though (it's just too strange).


BTW, the next conditional in bytearray_getbuffer ...

    if (ret >= 0) {
        obj->ob_exports++;
    }

is also superfluous, since PyBuffer_FillInfo() cannot fail
if readonly==0.

----------
components: Interpreter Core
files: bytearray_getbuffer.diff
keywords: needs review, patch
messages: 154969
nosy: ncoghlan, pitrou, skrah
priority: normal
severity: normal
stage: patch review
status: open
title: bytearray_getbuffer: unnecessary code
type: resource usage
versions: Python 3.3
Added file: http://bugs.python.org/file24738/bytearray_getbuffer.diff

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