https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104555
Bug ID: 104555
Summary: ICE in gfc_compare_derived_types, at
fortran/interface.cc:628
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Starts with r10, changed between 20190825 and 20190901 :
$ cat z1.f90
program p
type t
character(:), allocatable :: a
end type
contains
subroutine s(x)
class(t) :: x(..)
select rank (x)
rank (1)
select type (y => x)
type is (t)
end select
end select
end
end
$ gfortran-12-20220213 -c z1.f90
f951: internal compiler error: Segmentation fault
0xcc8a9f crash_signal
../../gcc/toplev.cc:322
0x6fbdbc gfc_compare_derived_types(gfc_symbol*, gfc_symbol*)
../../gcc/fortran/interface.cc:628
0x792efe gfc_type_is_extension_of(gfc_symbol*, gfc_symbol*)
../../gcc/fortran/symbol.cc:5116
0x77373c resolve_select_type
../../gcc/fortran/resolve.cc:9451
0x768b23 gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.cc:12173
0x76ab87 resolve_codes
../../gcc/fortran/resolve.cc:17536
0x76ac4e gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.cc:17571
0x768c99 gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.cc:17556
0x768c99 resolve_block_construct
../../gcc/fortran/resolve.cc:10791
0x768c99 gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.cc:12181
0x767eef gfc_resolve_blocks(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.cc:10943
0x769edf resolve_select_rank
../../gcc/fortran/resolve.cc:9953
0x769edf gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.cc:12177
0x76ab87 resolve_codes
../../gcc/fortran/resolve.cc:17536
0x76aabe resolve_codes
../../gcc/fortran/resolve.cc:17519
0x76ac4e gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.cc:17571
0x752f74 resolve_all_program_units
../../gcc/fortran/parse.cc:6586
0x752f74 gfc_parse_file()
../../gcc/fortran/parse.cc:6842
0x7a066f gfc_be_parse_file
../../gcc/fortran/f95-lang.cc:216
