custom material object can't be registered

[RWTHLHK]

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Question

I developed a custom material object that inherits 2 classes in solid mehcanics. So far I haven't added any new parameters and methods yet. But the i always get the error:
/home/linghao/projects/moose/framework/build/header_symlinks/Registry.h:275:42: error: could not convert 'std::make_unique(_Args&& ...) [with _Tp = ComputePFCFStress; _Args = {const InputParameters&}; __detail::__unique_ptr_t<_Tp> = __detail::__unique_ptr_t<ComputePFCFStress>]()' from 'unique_ptr<ComputePFCFStress,default_delete<ComputePFCFStress>>' to 'unique_ptr<MooseObject,default_delete<MooseObject>>' 275 | return std::make_unique<T>(parameters); | ^ | | | unique_ptr<ComputePFCFStress,default_delete<ComputePFCFStress>> make: *** [/home/linghao/projects/moose/framework/build.mk:151: /home/linghao/projects/isotropic_hardening/build/unity_src/material_Unity.x86_64-conda-linux-gnu.opt.lo] Error 1
I have no idea why this occurs. Can somebody please tell me how to fix this?

[GiudGiud]

Hello

2 classes in solid mehcanics.

which ones?
We can't do diamond inheritance in MOOSE (or in C++), unless you start using virtual inheritance which will take a few deeper modifications

Guillaume

[RWTHLHK]

I inherit ComputeLinearElasticFractureStress and ComputeMultipleInelasticStress. I guess both class inherit UpStressStateBase and this leads to error right?

[GiudGiud]

Yes exactly.

You would need to make these two classes virtually inherit from that common class to make it work.

Alternatively only pick one class to inherit and copy the code you need from the other class