[Bug c++/98843] Building simple c++ modules example fails but successful with -save-temps

[gcc at boltav dot me.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98843

--- Comment #1 from gazzatav <gcc at boltav dot me.uk> ---
Created attachment 50064
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50064&action=edit
mod.ii, main.ii - tmp files required by guidelines, a-iostream.ii too large