[Bug libfortran/79540] [7/8/9 Regression] FAIL: gfortran.dg/fmt_fw_d.f90 -O0 execution test

[danglin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79540

--- Comment #18 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 45989
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45989&action=edit
Patch

This fixes the stack overflow in memcpy.