Hi Jon, That'll be some bit of code passing that in as a creation option (-co) incorrectly - the warning is quite correct that GDAL_CACHEMAX is not a valid creation option for file formats. You'd either need to set an environment variable, or call `gdal.SetConfigOption`.
I've spotted a few similar examples before - usually typos that went unnoticed for a long time, but a few cases like this. Dr Daniel Evans Software Developer From: gdal-dev <[email protected]> On Behalf Of Jon Morris Sent: 08 June 2020 11:00 To: Even Rouault <[email protected]>; [email protected] Subject: Re: [gdal-dev] Segmentation fault on BuildOverviews Thanks for the quick fix Even! I'm also getting a warning that I can't find any reference to in the code. We don't get this at 2.2.0, so do you know what version dropped support for this option? Warning 6: driver GTiff does not support creation option GDAL_CACHEMAX Jon From: Even Rouault <[email protected]<mailto:[email protected]>> Sent: 08 June 2020 10:41 To: [email protected]<mailto:[email protected]> Cc: Jon Morris <[email protected]<mailto:[email protected]>> Subject: Re: [gdal-dev] Segmentation fault on BuildOverviews Jon, thanks for the report. I've just pushed a fix for that Even > Hello all, > > I think I've found an edge case in gdal.Dataset.BuildOverviews. I'm using > GDAL 3.0.4 and have found that some of our BuildOverviews tests were > crashing out with a seg fault. On investigation, it seems to be when > COMPRESS_OVERVIEW is set to LZW, the height is greater than the width, and > the overview list is long enough that we will end up with some 1x1 > overviews. Here is a code snippet that reproduces the crash. > > from osgeo import gdal > > gdal.SetConfigOption('COMPRESS_OVERVIEW', 'LZW') > > temp_path = '/tmp/test.tif' > drv = gdal.GetDriverByName('GTiff') > raster_ds = drv.Create(temp_path, 5, 6, 1, gdal.GDT_Int16) > del raster_ds > > tif = gdal.OpenEx(temp_path, gdal.GA_ReadOnly) > tif.BuildOverviews('nearest', overviewlist=[2, 4, 8]) > > > > The data type doesn't seem to matter (I've also tried Float32), but it seems > that the raster dimensions are important. I couldn't get it to fail if the > width was equal to or greater than the height. > > Thanks, > > Jon > > Jon Morris > Software Developer > > Skype<sip:[email protected]> > > COVID-19. During the current outbreak JBA remains open for business and we > continue to deliver our services. However, we have adopted flexible/remote > workingas required. I will be receiving and reading email as normal but I > may not always be available on the office number. > > > [JBA COVID-19 > statement]<https://www.jbagroup.co.uk/sites/www.jbagroup.co.uk/files/docume > nts/15-030%20JBA%20Business%20Continuity%20Briefing%20-%20Latest.pdf> > > T +44 (0) 1756 799919 > www.jbarisk.com<http://www.jbarisk.com<http://www.jbarisk.com%3chttp:/www.jbarisk.com>> > > [Visit our website]<http://www.jbarisk.com> > [http://www.jbagroup.co.uk/imgstore/JBA-Email-Sig-Icons-LINKEDIN.png] > <https://www.linkedin.com/in/jon-morris-a2897b4/> [Follow us on Twitter] > <https://twitter.com/jbarisk> Our postal address and registered office is > JBA Risk Management Limited, 1 Broughton Park, Old Lane North, Broughton, > Skipton, North Yorkshire BD23 3FD. > > Find out more about us here: > www.jbarisk.com<http://www.jbarisk.com/<http://www.jbarisk.com%3chttp:/www.jbarisk.com/>> > and > follow us on Twitter @JBARisk<http://twitter.com/JBARisk> and > LinkedIn<https://www.linkedin.com/company/2370847?trk=tyah&trkInfo=clickedV > ertical%3Acompany%2CclickedEntityId%3A2370847%2Cidx%3A2-1-2%2CtarId%3A144741 > 4259786%2Ctas%3AJBA%20RISK%20MANAGEMENT> > > The JBA Group supports the JBA Trust. > > All JBA Risk Management's email messages contain confidential information > and are intended only for the individual(s) named. If you are not the named > addressee you should not disseminate, distribute or copy this e-mail. > Please notify the sender immediately by email if you have received this > email by mistake and delete this email from your system. > > > JBA Risk Management Limited is registered in England, company number > 07732946, 1 Broughton Park, Old Lane North, Broughton, Skipton, North > Yorkshire, BD23 3FD, Telephone: +441756799919 -- Spatialys - Geospatial professional services http://www.spatialys.com [JBA COVID-19 statement]<https://www.jbagroup.co.uk/sites/www.jbagroup.co.uk/files/documents/15-030%20JBA%20Business%20Continuity%20Briefing%20-%20Latest.pdf> Our postal address and registered office is JBA Risk Management Limited, 1 Broughton Park, Old Lane North, Broughton, Skipton, North Yorkshire BD23 3FD. [JBA COVID-19 statement]<https://www.jbagroup.co.uk/sites/www.jbagroup.co.uk/files/documents/15-030%20JBA%20Business%20Continuity%20Briefing%20-%20Latest.pdf> Our postal address and registered office is JBA Risk Management Limited, 1 Broughton Park, Old Lane North, Broughton, Skipton, North Yorkshire BD23 3FD.
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