From: Mark Wooding <mdw@distorted.org.uk>
Date: Wed, 13 Nov 2019 02:50:55 +0000 (+0000)
Subject: mp.c: Release the `GFN' object through channels on error.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/catacomb-python/commitdiff_plain/79ac6c22fec9bad43320f43e6fefb31bdb7f9847?hp=79ac6c22fec9bad43320f43e6fefb31bdb7f9847

mp.c: Release the `GFN' object through channels on error.

If the given element turns out not to actually generate a normal basis
then we have to give up constructing the `GFN' object and raise an
exception.  In turns out that debug versions of Python get really
unhappy if you try to free objects which still have nonzero reference
counts, so:

  * use `Py_DECREF' to free the object on error; and

  * mark the object (by leaving `p' null) so that we don't actually
    free the conversion matrices if they're weren't set up.
---