https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123376
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- ipa-free-lang-data thinks the int type is not needed and that it only needs const int, but doesn't mangle plugh until dwarf2out wants to emit the &H::plugh and at that point it ICEs because the FE during the mangling rightly assumes that TYPE_MAIN_VARIANT of a type doesn't have CV quals.
