[Bug fortran/104927] New: Invalid array size specification accepted

[federico.perini at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104927

            Bug ID: 104927
           Summary: Invalid array size specification accepted
           Product: gcc
           Version: 10.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: federico.perini at gmail dot com
  Target Milestone: ---

Created attachment 52627
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52627&action=edit
test program

A low priority bug, I guess.

The following invalid code with double array size specifications is accepted by
gfortran 10.3.0 all the way down to at least 8.1.0:

integer, allocatable, dimension(:,:) :: a(:)
integer, allocatable, dimension(:)   :: b(:,:)
integer, allocatable, dimension(:,:) :: c(:,:)

It appears that the shape then picked by gfortran is that on the right hand
side, but no errors/warning are printed. I've attached a test program for this.

Thanks for the hardwork on gfortran!
Federico