re PR fortran/91802 (ICE in mio_name_expr_t, at fortran/module.c:2141)

2019-09-28  Steven G. Kargl  <kargl@gcc.ngu.org>

	PR fortran/91802
	* decl.c (attr_decl1): Check if rank+corank > 15.

2019-09-28  Steven G. Kargl  <kargl@gcc.ngu.org>

	PR fortran/91802
	* gfortran.dg/pr91802.f90: New test.

From-SVN: r276254

gcc/fortran/ChangeLog

+2019-09-28  Steven G. Kargl  <kargl@gcc.ngu.org>
+
+	PR fortran/91802
+	* decl.c (attr_decl1): Check if rank+corank > 15.
+
 2019-09-28  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/91864

gcc/fortran/decl.c

@@ -8468,6 +8468,15 @@ attr_decl1 (void)
       goto cleanup;
     }
 
+  /* Check F2018:C822.  */
+  if (sym->attr.dimension && sym->attr.codimension
+      && sym->as && sym->as->rank + sym->as->corank > 15)
+    {
+      gfc_error ("rank + corank of %qs exceeds 15 at %C", sym->name);
+      m = MATCH_ERROR;
+      goto cleanup;
+    }
+
   if (sym->attr.cray_pointee && sym->as != NULL)
     {
       /* Fix the array spec.  */

gcc/testsuite/ChangeLog

+2019-09-28  Steven G. Kargl  <kargl@gcc.ngu.org>
+
+	PR fortran/91802
+	* gfortran.dg/pr91802.f90: New test.
+
 2019-09-28  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/91864

gcc/testsuite/gfortran.dg/pr91802.f90

+! { dg-do compile }
+! { dg-options "-fcoarray=single" }
+! Code contributed by Gerhard Steinmetz
+! PR fortran/91802
+module m
+   real :: x
+   dimension ::   x(1,2,1,2,1,2,1,2)
+   codimension :: x[1,2,1,2,1,2,1,*] ! { dg-error "exceeds 15" }
+end