Crashing when Preparing Geometry with "Shown" components

[ReynoldsNo]

I recently downloaded OpenVSP versions 3.45.4 and 3.46.0 and noticed a rather odd error. 

I opened an old *.vsp3 file created in version 3.40.1 and tried running Prepare Geometry and also running VSPAERO and it crashed with the error: 

"double free or corruption (~!prev)"

After some digging, I noticed that when I run Prepare Geometry on 

• Shown components ==> crashes
• All components thin ==> OK
• All components thick ==> OK
• Set with All components: thin surfaces ==> OK
• Set with All components: thick surfaces ==> OK
• Mixed Sets thin/thick surfaces ==> OK

Any idea what might be causing the "Shown" components error??

Thanks

[Rob McDonald]

Are both thick and thin set to Shown?  You shouldn't have geometry in both thick and thin groups.

Otherwise, if you can share a file that demonstrates this, I can check it out.

Rob

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[ReynoldsNo]

Hi Rob, 

    So no.  

   Only thick is set to Shown or thin is set to Shown.   Not both.

   Here is an example file in which this error is occurring. 

   Also, some additional info.  

   Running OpenVSP 3.46.0

   Ubuntu Linux 24.04.3 LTS 

   WSL2 

   Thanks

   Cedric

[Brandon Litherland]

I opened your file with the generic fuselage and had no issues preparing the geometry.

Could be a WSL / Linux build issue.

[ReynoldsNo]

The behavior is a bit sporadic. 

I opened the file and ran Prepare Solver with Thin ==> Shown    Thick ==> None and it worked

Then I                          ran Prepare Solver with Thin ==> None       Thick ==> Shown and it crashed

Then I re-opened the file and ran Prepare Solver with Thin ==> Shown    Thick ==> None and it crashed again. 

Not sure what to do with this.  But I will keep investigating. 

Thanks!

[Rob McDonald]

I suspect it is a bug related to pointers..  Ubuntu builds are built with GCC, MacOS builds are built with clang, Windows builds with MSVC.  These kinds of things sometimes behave differently depending on the compiler and the platform.

I will need to debug this on a Linux machine.

Updating my Win/Linux dual boot box to Win 11 meant I had to blow away my Ubuntu partition.  I have some RHEL / SLES VM's, but I haven't taken the time to build up an Ubuntu one yet.

So, maybe this bug will show on one of those VM's, but no matter what, it will take a while for me to be able to dig into this.

Rob

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