[deal.II] TBB issue on an arm-based Mac

Hello everyone, I encountered a TBB issue when I was testing two deal.II programs that worked very well on the Linux OS. The programs don't stop at the first time step. Instead, after several time steps, the programs stopped. The errors occurred randomly. They were killed by different failed T

Re: [deal.II] error: cannot declare variable ‘postprocessor’ to be of abstract type ‘FracturePhaseFieldProblem<2>::Postprocessor’

Yu: classFracturePhaseFieldProblem {     public: …     private: … void output_results () const; class Postprocessor; This is what's called a "forward declaration". The line really just says "There is a class Postprocessor" but because you don't provide the details in a {...} block,