https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115167
David Malcolm <dmalcolm at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED --- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> --- > Also, gcc119 would be a much better choice than gcc111. Thanks; am trying on that. FWIW r15-636-g770657d02c986c added a new vfunc to libcpp: range_label::get_effects and it's *defined* in the header, so my immediately suspicion is that's the issue. Investigating...