[Bug fortran/92174] runtime error: index 15 out of bounds for type 'gfc_expr *[15]

[sgk at troutmask dot apl.washington.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92174

--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Tue, Oct 22, 2019 at 02:14:55PM +0000, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92174
> 
> --- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
> (In reply to kargl from comment #1)
> > (In reply to Martin Liška from comment #0)
> > > Happens with UBSAN build in:
> > > 
> > > $ ./xgcc -B.
> > > /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr91802.f90
> > > -fcoarray=single
> > > ../../gcc/fortran/array.c:867:36: runtime error: index 15 out of bounds for
> > > type 'gfc_expr *[15]'
> > 
> > 
> > What are you doing?  pr91802.f90 is a compile time test.
> > It cannot generate a runtime error.
> 
> It's a runtime error of the GCC compiler that compiles the test-case ;)
> The error message is a bit misleading.
> 

So, what does your tool do?  gfortran correctly diagnosis
that rank+corank > 15, issues an error, and exits.  What is
the problem?