[DynamicType] Tracking filed compiler bugs #4963

dynamic_type lib does not compile on C++20 even with the latest g++. I filed two compiler bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111314
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111316
awaiting confirmation.

dynamic_type does compile on C++20 with clang++, but the test is failing for comparison operators of containers. Not sure if this is a compiler bug or a standard library bug, or neither. I narrowed it down to a minimal repro that is reproducible both on g++ and clang++. Trying at:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111504
llvm/llvm-project#67056