Crash reading vtm dataset (#18189) · Issues · ParaView / ParaView

Crash reading vtm dataset

We are going to create a vtm dataset, and read it into ParaView. This will crash. Here is how to replicate:

Master (v5.5.0-340-ga3633e), Linux, build-in server. NOTE - this is a debug build.
Load can.exo. All vars on. Turn off EQPS and ACCL. Only load Unnamed block ID: 1. Apply.
File/ Save Data. Save as canA, as an exodus file. Save all timesteps.
Back to can in the pipeline browser. All vars on. Only load Unnamed block ID: 2. Apply.
File/ Save Data. Save as canB, as an exodus file. Save all timesteps.
Reset Session.
Load canA. Apply. Load canB. Apply.
Select both cans. Group Datasets. Apply.
Save as VTM dataset. Save all timesteps.
Reset Session.
Load this new vtm dataset. We will crash, with the following:

paraview: /projects/viz/paraview/src/ParaView/5.6.0-junk/ParaView5/VTK/IO/XML/vtkXMLDataReader.cxx:297: virtual void vtkXMLDataReader::SetupOutputData(): Assertion `this->NumberOfPointArrays == this->PointDataArraySelection->GetNumberOfArraysEnabled()' failed.

We are going to create a vtm dataset, and read it into ParaView.  This will crash.  Here is how to replicate:
* Master (v5.5.0-340-ga3633e), Linux, build-in server. NOTE - this is a debug build.
* Load can.exo.  All vars on.  Turn off EQPS and ACCL.  Only load Unnamed block ID: 1.  Apply.
* File/ Save Data.  Save as canA, as an exodus file.  Save all timesteps.
* Back to can in the pipeline browser.  All vars on.  Only load Unnamed block ID: 2.  Apply.
* File/ Save Data.  Save as canB, as an exodus file. Save all timesteps.
* Reset Session.
* Load canA. Apply. Load canB. Apply.
* Select both cans.  Group Datasets.  Apply.
* Save as VTM dataset.  Save all timesteps.
* Reset Session.
* Load this new vtm dataset.  We will crash, with the following:

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