Segementation fault if you include AddConductingSheet() but no primative

[Aspire-Design-Ltd]

If I add the following line to a working simulation but do not define a primitive then I get a Segemtation fault.
sheet = csx.AddConductingSheet('Carbon_fiber', conductivity=2, thickness=1e-3)

Its a simple mistake to make and the FDTD simulator warns you of the error but then continues with the simulation and finishes with the fault.

---------------------------------------------------------------------- 
 | openEMS 64bit -- version v0.0.36-82-g8a008a4
 | (C) 2010-2023 Thorsten Liebig <thorsten.liebig@gmx.de>  GPL license
 ---------------------------------------------------------------------- 
        Used external libraries:
                CSXCAD -- Version: v0.6.3-43-g3c24814
                hdf5   -- Version: 1.10.7
                          compiled against: HDF5 library version: 1.10.7
                tinyxml -- compiled against: 2.6.2
                fparser
                boost  -- compiled against: 1_74
                vtk -- Version: 9.1.0
                       compiled against: 9.1.0

Create FDTD operator (compressed SSE + multi-threading)
FDTD simulation size: 57x24x270 --> 369360 FDTD cells 
FDTD timestep is: 2.40804e-13 s; Nyquist rate: 79 timesteps @2.62833e+10 Hz
Excitation signal length is: 3966 timesteps (9.55029e-10s)
Max. number of timesteps: 10000 ( --> 2.52143 * Excitation signal length)
openEMS::SetupFDTD: Warning, max. number of timesteps is smaller than three times the excitation. 
        You may want to choose a higher number of max. timesteps... 
Create FDTD engine (compressed SSE + multi-threading)
Warning: No primitives found in property: Carbon_fiber!
Running FDTD engine... this may take a while... grab a cup of coffee?!?
[@        4s] Timestep:         2983 || Speed:  274.6 MC/s (1.345e-03 s/TS) || Energy: ~1.02e-21 (- 0.00dB)
[@        8s] Timestep:         6707 || Speed:  342.3 MC/s (1.079e-03 s/TS) || Energy: ~1.06e-29 (-79.85dB)
Time for 6707 iterations with 369360.00 cells : 8.03 sec
Speed: 308.47 MCells/s 
Segmentation fault (core dumped)

[thliebig]

Yes I can confirm this. Because this property does not have anything to do it is not initialized. But the destructor does not check it and tries to clean it up...