[Bug fortran/61831] [4.9/ 4.10 Regression] runtime error: pointer being freed was not allocated

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61831

--- Comment #16 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
>From the files in the attachment in comment 8, the files that are affected by
this PR are beams.f90, models.f90, and process_libraries.f90:

beams.f90: In function 'beam_data_write':
beams.f90:144:0: internal compiler error: in gfc_conv_expr_reference, at
fortran/trans-expr.c:6519
     prt_name_len = maxval (len (flavor_get_name (beam_data%flv)))

models.f90:1418:0: internal compiler error: in gfc_conv_expr_reference, at
fortran/trans-expr.c:6519
          maxval (len (particle_data_get_name (model%prt, .true.))))

process_libraries.f90: In function 'process_libraries_8':
process_libraries.f90:2429:0: internal compiler error: in
gfc_conv_expr_reference, at fortran/trans-expr.c:6519
          variant = core_def)

(using a version giving an ICE when using the faulty code).

One thing you can try is to make WHIZARD with 4.9.1, then compile the above
files with 4.9.0, make again, and see if the problem goes away.