https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94869
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |rejects-valid Last reconfirmed| |2020-04-30 Target Milestone|--- |10.0 Summary|Template argument |[10 Regression] Template |deduction/substitution |argument |failure with Howard |deduction/substitution |Hinnant's calendar library |failure with Howard | |Hinnant's calendar library Component|c++ |libstdc++ Status|UNCONFIRMED |WAITING Ever confirmed|0 |1 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Can you provide a complete testcase? I'm sure date.h does not include any STL bits. That is, please provide preprocessed source.