[Bug c++/89537] missing location for error

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89537

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 45855
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45855&action=edit
gzipped unreduced testcase