[Bug fortran/85631] New: Runtime error message array bound mismatch with nonzero optimization

[zeccav at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85631

            Bug ID: 85631
           Summary: Runtime error message array bound mismatch with
                    nonzero optimization
           Product: gcc
           Version: 8.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zeccav at gmail dot com
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu

! Runtime error message on good Fortran
! gfortran -O -g -fcheck=bounds
! must be compiled and run
!At line 20 of file pcp2k.f
!Fortran runtime error: Array bound mismatch for dimension 1 of array
'__var_1_mma' (0/2)

!Error termination. Backtrace:
!#0  0x1496530ec2de in ???
!#1  0x1496530ece89 in ???
!#2  0x1496530ed26b in ???
!#3  0x40082d in MAIN__
!       at /home/vitti/test/pcp2k.f:8
!#4  0x40086e in main
!       at /home/vitti/test/pcp2k.f:9
      integer, parameter :: N=2
      real, dimension(:,:), pointer :: block_1, block_2
      allocate(block_1(N,N),block_2(N,N))
      block_1=0
      block_2=0
      block_1 = MATMUL(TRANSPOSE(block_1), block_2)
      end