https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71895
Bug ID: 71895
Summary: ICE in gfc_compare_derived_types, at
fortran/interface.c:520
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gerhard.steinmetz.fort...@t-online.de
Target Milestone: ---
Eventually cross-linked with pr71862, pr71894 :
$ cat z1.f90
program p
type t
integer :: n
end type
type(t) :: x
class(t) :: y
print *, extends_type_of(x, y)
print *, extends_type_of(y, x)
end
$ gfortran-6 z1.f90 # release
z1.f90:6:16:
class(t) :: y
1
Error: CLASS variable 'y' at (1) must be dummy, allocatable or pointer
(null):0: confused by earlier errors, bailing out
$ gfortran-7-20160710 z1.f90 # eperimental
z1.f90:6:16:
class(t) :: y
1
Error: CLASS variable 'y' at (1) must be dummy, allocatable or pointer
f951: internal compiler error: in gfc_compare_derived_types, at
fortran/interface.c:520
0x68db69 gfc_compare_derived_types(gfc_symbol*, gfc_symbol*)
../../gcc/fortran/interface.c:520
0x70b3da gfc_type_is_extension_of(gfc_symbol*, gfc_symbol*)
../../gcc/fortran/symbol.c:4832
0x6fcabb gfc_simplify_extends_type_of(gfc_expr*, gfc_expr*)
../../gcc/fortran/simplify.c:2384
0x694cb9 do_simplify
../../gcc/fortran/intrinsic.c:4150
0x69e60c gfc_intrinsic_func_interface(gfc_expr*, int)
../../gcc/fortran/intrinsic.c:4506
0x6e3e66 resolve_unknown_f
../../gcc/fortran/resolve.c:2718
0x6e3e66 resolve_function
../../gcc/fortran/resolve.c:3020
0x6e3e66 gfc_resolve_expr(gfc_expr*)
../../gcc/fortran/resolve.c:6353
0x6e8a91 gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.c:10469
0x6e87eb gfc_resolve_blocks(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.c:9520
0x6e8b9e gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.c:10459
0x6eb272 resolve_codes
../../gcc/fortran/resolve.c:15667
0x6eb361 gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:15701
0x6d668a resolve_all_program_units
../../gcc/fortran/parse.c:5853
0x6d668a gfc_parse_file()
../../gcc/fortran/parse.c:6105
0x718d12 gfc_be_parse_file
../../gcc/fortran/f95-lang.c:198
