On Sat, Aug 12, 2017 at 8:46 PM, Michael Paquier
<michael.paqu...@gmail.com> wrote:
> I have not investigated much this problem yet, but has somebody else
> seen those diffs?

Coming back to that... Downgrading down to 2.9.4+4+g3169602-1 is
proving to put things back the way they should. Even downgrading to
2.9.4+91+g872fea94-1 did not help much, and 2.9.4+96+gfb56f80e-1 is
the newest version.

I have logged an issue to archlinux website to let them know about the
regression, because they are shipping a broken package:

Using this information I have done as well some bisecting of libxml2,
to finish with the following commit as culprit:
commit 46dc989080d5d6b7854de8fb3cb3de55ecbf0621
Author: Nick Wellnhofer <wellnho...@aevum.de>
Date:   Thu Jun 8 02:24:56 2017 +0200

    Don't switch encoding for internal parameter entities

    This is only needed for external entities. Trying to switch the encoding
    for internal entities could also cause a memory leak in recovery mode.

So I have logged as well a bug for the upstream folks:

Please note that I have not concluded yet if PostgreSQL is to blame or
not in this case with its use of the libxml2 APIs...

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