https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91548
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> --- (In reply to Hannes Hauswedell from comment #2) > Any news on this issue? We are using this pattern in some rather central > files in our library and the bug literally breaks 90% of our unit tests so > we can't keep track of other gcc10 issues or try the new concepts support... > > Thank you for your help! BTW, is the library publicly accessible? If it is, I could try to compile it when I have a fix for this to make sure it's resolved.