https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71193
Jason Merrill <jason at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED Summary|[6/7 Regression] error: |[7 Regression] error: |invalid use of incomplete |invalid use of incomplete |type |type --- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> --- Not a compiler bug. Also doesn't affect GCC 6, since r236221 was after the branch.