[Bug fortran/53379] New: [4.7 Regression] No backtrace generated for array bounds violation

[anlauf at gmx dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53379

             Bug #: 53379
           Summary: [4.7 Regression] No backtrace generated for array
                    bounds violation
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: anl...@gmx.de


With gfortran 4.6.2 I got a useful traceback for the program given below:

% gfortran -g -fbacktrace -fcheck=all gfcbug119.f90
% ./a.out 
At line 8 of file gfcbug119.f90
Fortran runtime error: Index '-1' of dimension 1 of array 'k' below lower bound
of 1

Backtrace for this error:
  + function foo (0x80486F4)
    at line 8 of file gfcbug119.f90
  + function gfcbug119 (0x80487D0)
    at line 4 of file gfcbug119.f90
  + /lib/libc.so.6(__libc_start_main+0xf3) [0xb73b7003]

Version 4.7 only produces:
At line 8 of file gfcbug119.f90
Fortran runtime error: Index '-1' of dimension 1 of array 'k' below lower bound
of 1


So, unfortunately no backtrace anymore. :-(
I'll try to figure out what's going wrong.

program gfcbug119
  implicit none
  integer :: k(10)
  call foo (k,-1)
contains
  subroutine foo (k,i)
    integer, intent(in) :: k(:), i
    print *, k(i)
  end subroutine foo
end program gfcbug119