https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99255
Bug ID: 99255
Summary: ICE in gfc_dt_upper_string, at fortran/module.c:441
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Affects versions down to at least r5,
with a missing attribute allocatable or pointer :
(follow-up of pr95980)
$ cat z1.f90
program p
type t
character(:), allocatable :: c
end type
class(t) :: x
select type (y => x)
end select
end
$ cat z2.f90
program p
type t
character(:), allocatable :: c(:)
end type
class(t) :: x
select type (y => x)
end select
end
$ gfortran-11-20210221 -c z1.f90
f951: internal compiler error: Segmentation fault
0xda031f crash_signal
../../gcc/toplev.c:327
0x6fecd0 gfc_dt_upper_string(char const*)
../../gcc/fortran/module.c:441
0x69e74a get_unique_type_string
../../gcc/fortran/class.c:490
0x69f191 get_unique_hashed_string
../../gcc/fortran/class.c:524
0x6a2678 gfc_build_class_symbol(gfc_typespec*, symbol_attribute*,
gfc_array_spec**)
../../gcc/fortran/class.c:672
0x6f9393 gfc_match_select_type()
../../gcc/fortran/match.c:6449
0x719244 match_word
../../gcc/fortran/parse.c:65
0x719244 decode_statement
../../gcc/fortran/parse.c:428
0x71aa7c next_free
../../gcc/fortran/parse.c:1316
0x71aa7c next_statement
../../gcc/fortran/parse.c:1548
0x71c0eb parse_spec
../../gcc/fortran/parse.c:3967
0x71eebc parse_progunit
../../gcc/fortran/parse.c:5896
0x7205b1 gfc_parse_file()
../../gcc/fortran/parse.c:6437
0x76dbcf gfc_be_parse_file
../../gcc/fortran/f95-lang.c:212
