[Bug fortran/95374] New: ICE: gfc_array_size failed

[Bug fortran/95374] New: ICE: gfc_array_size failed

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95374

            Bug ID: 95374
           Summary: ICE: gfc_array_size failed
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Affects versions down to at least r5, z2.f90 works :


$ cat z1.f90
program p
   integer :: i
   integer, parameter :: a(0) = 0
   integer, parameter :: b(*) = [(a(i:i), i=0,0)]
end


$ cat z2.f90
program p
   integer :: i
   integer, parameter :: a(0) = 0
   integer, parameter :: b(0) = [(a(i:i), i=0,0)]
end


$ gfortran-11-20200524 -c z1.f90
f951: internal compiler error: gfc_array_size failed
0x6519b9 gfc_report_diagnostic
        ../../gcc/fortran/error.c:782
0x6530da gfc_internal_error(char const*, ...)
        ../../gcc/fortran/error.c:1402
0x63b57d add_init_expr_to_sym
        ../../gcc/fortran/decl.c:2039
0x64503a variable_decl
        ../../gcc/fortran/decl.c:2990
0x64503a gfc_match_data_decl()
        ../../gcc/fortran/decl.c:6190
0x6a83d3 match_word
        ../../gcc/fortran/parse.c:65
0x6a83d3 decode_statement
        ../../gcc/fortran/parse.c:376
0x6a9e1a next_free
        ../../gcc/fortran/parse.c:1279
0x6a9e1a next_statement
        ../../gcc/fortran/parse.c:1511
0x6ab46b parse_spec
        ../../gcc/fortran/parse.c:3922
0x6ae23c parse_progunit
        ../../gcc/fortran/parse.c:5851
0x6af919 gfc_parse_file()
        ../../gcc/fortran/parse.c:6392
0x6fb9af gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:210

[Bug fortran/95374] ICE: gfc_array_size failed

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95374

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|ice-on-valid-code           |accepts-invalid,
                   |                            |ice-on-invalid-code
           Priority|P3                          |P4
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2020-06-05
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from anlauf at gcc dot gnu.org ---
Example z2.f90 is actually invalid code that is not rejected,
since the rhs takes element a(0) which is out-of-bounds, has size 1,
whereas the lhs has size 0.

For the same reason, z1.f90 is invalid code since it accesses a(0).

[Bug fortran/95374] ICE: gfc_array_size failed

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95374

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |anlauf at gcc dot gnu.org
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=104352
           Assignee|unassigned at gcc dot gnu.org      |anlauf at gcc dot gnu.org
             Status|NEW                         |ASSIGNED

--- Comment #2 from anlauf at gcc dot gnu.org ---
Submitted: https://gcc.gnu.org/pipermail/fortran/2023-May/059307.html

[Bug fortran/95374] ICE: gfc_array_size failed

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95374

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Harald Anlauf <anlauf@gcc.gnu.org>:

https://gcc.gnu.org/g:7bafe652dba9167b65e7b5ef24e77eceb49709ba

commit r14-950-g7bafe652dba9167b65e7b5ef24e77eceb49709ba
Author: Harald Anlauf <anlauf@gmx.de>
Date:   Wed May 17 20:39:18 2023 +0200

    Fortran: set shape of initializers of zero-sized arrays [PR95374,PR104352]

    gcc/fortran/ChangeLog:

            PR fortran/95374
            PR fortran/104352
            * decl.cc (add_init_expr_to_sym): Set shape of initializer also for
            zero-sized arrays, so that bounds violations can be detected later.

    gcc/testsuite/ChangeLog:

            PR fortran/95374
            PR fortran/104352
            * gfortran.dg/zero_sized_13.f90: New test.

[Bug fortran/95374] ICE: gfc_array_size failed

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95374

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
   Target Milestone|---                         |14.0
         Resolution|---                         |FIXED

--- Comment #4 from anlauf at gcc dot gnu.org ---
Fixed on mainline for gcc-14.  Closing.

Thanks for the report!

[Bug fortran/95374] ICE: gfc_array_size failed

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95374

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Harald Anlauf
<anlauf@gcc.gnu.org>:

https://gcc.gnu.org/g:0dd82c0fba660775ff76ae27077a67f2f1358920

commit r13-8557-g0dd82c0fba660775ff76ae27077a67f2f1358920
Author: Harald Anlauf <anlauf@gmx.de>
Date:   Wed May 17 20:39:18 2023 +0200

    Fortran: set shape of initializers of zero-sized arrays [PR95374,PR104352]

    gcc/fortran/ChangeLog:

            PR fortran/95374
            PR fortran/104352
            * decl.cc (add_init_expr_to_sym): Set shape of initializer also for
            zero-sized arrays, so that bounds violations can be detected later.

    gcc/testsuite/ChangeLog:

            PR fortran/95374
            PR fortran/104352
            * gfortran.dg/zero_sized_13.f90: New test.

    (cherry picked from commit 7bafe652dba9167b65e7b5ef24e77eceb49709ba)