https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004 Bug 55004 depends on bug 68530, which changed state.
Bug 68530 Summary: [C++14] sorry, unimplemented: unexpected AST of kind loop_expr https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68530 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED