mpp_error outputs bad ascii values with GNU 15

[rem1776]

Describe the bug
mpp_error seems to output only random ascii values when compiled with gcc 15. This happens in a lot of the test scripts but since it only affects the output they still pass.

To Reproduce

program mpp_error_test
  use fms
  implicit none
  call fms_init()
  call fms_mpp_error( NOTE, 'this wont be output because it is broken')
  call fms_end()
end program

results in:

       ????????????????����������������                �����0����Q0f7@��j0@@!&70@�t~�6@ �j0@�? �j0@��j0@@470@} re�T\�DB@>�␦70@���������Dw�U��@0�Dw�U���0����Q�0����.@��Q
����������������                ��������������\�NONE            ��\NONE            ��\warning:
 MPP_DOMAINS_STACK high water mark=           0

Tabulating mpp_clock statistics across      1 PEs...

                                      hits          tmin          tmax          tavg          tstd  tfrac grain pemin pemax
Total runtime                            1      0.001140      0.001140      0.001140      0.000000  1.000     0     0     0
 MPP_STACK high water mark=           0

built with gcc 15 + debug flags on the amd box.

This also happens on the CI image.

Expected behavior
Output should work as expected.

System Environment
amd box and CI image