<div dir="ltr"><div>Hi strk,</div><div><br></div><div>I just compiled Postgis master and the issue is gone.</div><div><br></div><div>It now works consistently between ST_IsValid() and ST_IsValidReason() and doesn't change over time.</div><div><br></div><div>So if these memory issue fixes you made in master could go back into the production release, it would be great.</div><div><br></div><div>Thanks,</div><div>Andreas<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 23 Dec 2020 at 16:56, Sandro Santilli <<a href="mailto:strk@kbt.io">strk@kbt.io</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Wed, Dec 23, 2020 at 04:51:07PM +0100, Andreas Neumann wrote:<br>
> Hi Strk and Nicolas,<br>
> <br>
> Thanks for your replies.<br>
> <br>
> I'm using GEOS 3.9, PostgreSQL 13.1 and Postgis 3.1 (self-compiled).<br>
> <br>
> The situation is really weird: if I run the same SQL query a second<br>
> time, the contradiction is gone and all geometries are labeled as<br>
> invalid by ST_IsValidReason(). If I run it many times, the results<br>
> change even more, suddenly, the invalid geometries are not even detected<br>
> correctly by ST_IsValid().<br>
> <br>
> @strk: these invalid geometries contain "NaN" coordinates.<br>
> <br>
> I will open an issue and submit the geometries.<br>
<br>
Can you first try to rebuild PostGIS from current master branch ?<br>
I've fixed a memory issue somewhat related to "NaN" coordinates<br>
<br>
--strk;<br>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><br>--<br>Andreas Neumann<br></div><a href="http://QGIS.ORG" target="_blank">QGIS.ORG</a> board member (treasurer)<br></div></div>