[Bug fortran/125458] [13/14/15/16/17 Regression] Constant integer overflow not detected

[albert at tugraz dot at via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125458

--- Comment #20 from Christopher Albert <albert at tugraz dot at> ---
Created attachment 65205
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65205&action=edit
v2: Preserve signed overflow diagnostics with -funsigned