[Bug middle-end/68983] [6 Regression] ICE: in store_field, at expr.c:6659

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68983

--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Created attachment 37245
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37245&action=edit
possible patch

Would this be an appropriate fix?  It seems that if the source is a ref we
won't copy anything onto the stack.