[Bug other/69554] Multi-location diagnostics writes too many lines

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69554

--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Created attachment 37522
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37522&action=edit
patch to expose the problem