https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91586
Bug ID: 91586
Summary: [9/10 Regression] ICE in gfc_find_derived_vtab, at
fortran/class.c:2245
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Changed between 20180909 and 20180916 :
$ cat z1.f90
program p
type t
class(*), allocatable :: a
end type
class(t) :: x, y
y = x
end
$ gfortran-9-20180909 -c z1.f90
z1.f90:5:16:
5 | class(t) :: x, y
| 1
Error: CLASS variable 'x' at (1) must be dummy, allocatable or pointer
z1.f90:5:19:
5 | class(t) :: x, y
| 1
Error: CLASS variable 'y' at (1) must be dummy, allocatable or pointer
z1.f90:6:3:
6 | y = x
| 1
Error: Nonallocatable variable must not be polymorphic in intrinsic assignment
at (1) - check that there is a matching specific subroutine for '=' operator
$ gfortran-10-20190825 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb3acef crash_signal
../../gcc/toplev.c:326
0x5f9ca3 gfc_find_derived_vtab(gfc_symbol*)
../../gcc/fortran/class.c:2245
0x5fdbe5 gfc_find_vtab(gfc_typespec*)
../../gcc/fortran/class.c:2865
0x64c7a2 gfc_match_assignment()
../../gcc/fortran/match.c:1375
0x66e500 match_word
../../gcc/fortran/parse.c:65
0x66e500 decode_statement
../../gcc/fortran/parse.c:361
0x67006a next_free
../../gcc/fortran/parse.c:1241
0x67006a next_statement
../../gcc/fortran/parse.c:1473
0x67167b parse_spec
../../gcc/fortran/parse.c:3865
0x67411c parse_progunit
../../gcc/fortran/parse.c:5680
0x675799 gfc_parse_file()
../../gcc/fortran/parse.c:6220
0x6bf60f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
