add more checks in `CombinatorStore::gen_arg_processing` #2580

Job	Run time
focal / g++-10 / c++20 / asan=on / ubsan=off	27m 10s
focal / clang++ / c++17 / asan=off / ubsan=on	26m 53s
jammy / g++ / c++20 / asan=on / ubsan=off	27m 9s
	1h 21m 12s

Provide feedback