https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54367 Bug 54367 depends on bug 102644, which changed state.
Bug 102644 Summary: deduction failure when having default non-type template parameters that are lambdas https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102644 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE