PR fortran/93364 - ICE in gfc_set_array_spec, at fortran/array.c:879

Add missing check in gfc_set_array_spec for sum of rank and corank to not
exceed GFC_MAX_DIMENSIONS.

2020-04-20  Harald Anlauf  <anlauf@gmx.de>

	PR fortran/93364
	* array.c (gfc_set_array_spec): Check for sum of rank and corank
	not exceeding GFC_MAX_DIMENSIONS.

2020-04-20  Harald Anlauf  <anlauf@gmx.de>

	PR fortran/93364
	* gfortran.dg/pr93364.f90: New test.

gcc/fortran/ChangeLog

+2020-04-20  Harald Anlauf  <anlauf@gmx.de>
+
+	PR fortran/93364
+	* array.c (gfc_set_array_spec): Check for sum of rank and corank
+	not exceeding GFC_MAX_DIMENSIONS.
+
 2020-04-20  Steve Kargl  <kargl@gcc.gnu.org>
 	Thomas Koenig  <tkoenig@gcc.gnu.org>
 

gcc/fortran/array.c

@@ -864,6 +864,10 @@ gfc_set_array_spec (gfc_symbol *sym, gfc_array_spec *as, locus *error_loc)
       return false;
     }
 
+  /* Check F2018:C822.  */
+  if (sym->as->rank + sym->as->corank > GFC_MAX_DIMENSIONS)
+    goto too_many;
+
   if (as->corank)
     {
       sym->as->cotype = as->cotype;

gcc/testsuite/ChangeLog

+2020-04-20  Harald Anlauf  <anlauf@gmx.de>
+
+	PR fortran/93364
+	* gfortran.dg/pr93364.f90: New test.
+
 2020-04-20  Steve Kargl  <kargl@gcc.gnu.org>
 	Thomas Koenig  <tkoenig@gcc.gnu.org>

gcc/testsuite/gfortran.dg/pr93364.f90

+! { dg-do compile }
+! { dg-options "-fcoarray=single" }
+!
+! PR fortran/93364 - check fix for ICE in gfc_set_array_spec
+
+type(t) function f()
+  codimension :: t[1,2,1,2,1,2,1,*]
+  dimension :: t(1,2,1,2,1,2,1,2)
+end
+
+! { dg-error "has not been declared" " " { target *-*-* } 6 }
+! { dg-error "is of type 't'" " " { target *-*-* } 6 }
+! { dg-error "rank \\+ corank of" " " { target *-*-* } 8 }