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Subject: [Bug fortran/55272] New: [4.8 Regression] ICE on passing coarray argument between files
Date: Sun, 11 Nov 2012 17:37:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55272

             Bug #: 55272
           Summary: [4.8 Regression] ICE on passing coarray argument
                    between files
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dominiq@lps.ens.fr
                CC: burnus@gcc.gnu.org


>>From http://gcc.gnu.org/ml/fortran/2012-11/msg00021.html

$ cat co_sum_module.f90
module co_sum_module
  implicit none
contains
  subroutine co_sum(scalar)
    integer scalar[*]
  end subroutine
end module

$ cat league.f90 
program main
  use co_sum_module
  implicit none    
  integer score[*] 
  call co_sum(score)
end program

$ gfortran -c -fcoarray=single co_sum_module.f90
$ gfortran -fcoarray=single league.f90 co_sum_module.o
league.f90: In function 'MAIN__':
league.f90:5:0: internal compiler error: Segmentation fault: 11
   call co_sum(score)

Revision 189780 (2012-07-23) is OK, revision 189986 (2012-07-30) gives the ICE.
The backtrace at r193387 is

#0  gfc_get_nodesc_array_type (etype=<value optimized out>, as=<value optimized
out>, packed=<value optimized out>, restricted=<value optimized out>)
    at ../../_clean/gcc/fortran/trans-types.c:1574
#1  0x000000010011f778 in gfc_sym_type (sym=<value optimized out>) at
../../_clean/gcc/fortran/trans-types.c:2157
#2  0x000000010011e3a5 in gfc_get_function_type (sym=<value optimized out>) at
../../_clean/gcc/fortran/trans-types.c:2766
#3  0x00000001000e3bbe in gfc_get_extern_function_decl (sym=<value optimized
out>) at ../../_clean/gcc/fortran/trans-decl.c:1750
#4  0x00000001000efbf2 in gfc_conv_procedure_call (se=<value optimized out>,
sym=<value optimized out>, args=<value optimized out>, 
    expr=<value optimized out>, append_args=<value optimized out>) at
../../_clean/gcc/fortran/trans-expr.c:2675
#5  0x0000000100111b20 in gfc_trans_call (code=<value optimized out>,
dependency_check=<value optimized out>, mask=<value optimized out>, 
    count1=<value optimized out>, invert=<value optimized out>) at
../../_clean/gcc/fortran/trans-stmt.c:407
#6  0x00000001000c85f0 in trans_code (code=0x141514fb0, cond=0x0) at
../../_clean/gcc/fortran/trans.c:1385
#7  0x00000001000e7004 in gfc_generate_function_code (ns=<value optimized out>)
at ../../_clean/gcc/fortran/trans-decl.c:5349
#8  0x000000010008465f in gfc_parse_file () at
../../_clean/gcc/fortran/parse.c:4634
#9  0x00000001000c4376 in gfc_be_parse_file () at
../../_clean/gcc/fortran/f95-lang.c:191
#10 0x000000010066a509 in compile_file () at ../../_clean/gcc/toplev.c:544
#11 0x000000010066c369 in toplev_main (argc=4, argv=0x7fff5fbfd758) at
../../_clean/gcc/toplev.c:1864
#12 0x000000010000acb4 in start (pc=<value optimized out>, bases=0x0) at
../../../_clean/libgcc/config/unwind-dw2-fde-darwin.c:271

The ICE disappears if I revert revision 189881 on top of 193391.

Note that the ICE can be reproduced with a single file compiled with
-fcoarray=single -fno-whole-file.