mirek wrote on Sat, 09 July 2022 18:49

It works 100% with clang 14 in Windows, hence I think the problem is somewhere else than in clang. It works without preamble in clang 10 for me too. Too soon to try something else at this point.

IMHO, you just haven't tested it very well yet. I was just "lucky" to hit a bug with my first test. My code is not that complicated. It is mostly C++98, but I use a lot of simple templates, but nothing fancy like SFINAE.