Re: [PATCH 04/23] vla: make dynamic fortran arrays functional.
https://sourceware.org/ml/gdb-patches/2014-06/msg00570.html

Index: gdb-7.10.50.20151027/gdb/valarith.c
===================================================================
--- gdb-7.10.50.20151027.orig/gdb/valarith.c	2015-11-03 20:41:48.543504999 +0100
+++ gdb-7.10.50.20151027/gdb/valarith.c	2015-11-03 20:46:36.995238888 +0100
@@ -193,10 +193,17 @@ value_subscripted_rvalue (struct value *
   struct type *array_type = check_typedef (value_type (array));
   struct type *elt_type = check_typedef (TYPE_TARGET_TYPE (array_type));
   unsigned int elt_size = type_length_units (elt_type);
-  unsigned int elt_offs = longest_to_int (index - lowerbound);
+  unsigned int elt_offs;
   LONGEST elt_stride = TYPE_BYTE_STRIDE (TYPE_INDEX_TYPE (array_type));
   struct value *v;
 
+  if (TYPE_NOT_ASSOCIATED (array_type))
+    error (_("no such vector element (vector not associated)"));
+  if (TYPE_NOT_ALLOCATED (array_type))
+    error (_("no such vector element (vector not allocated)"));
+
+  elt_offs = longest_to_int (index - lowerbound);
+
   if (elt_stride > 0)
     elt_offs *= elt_stride;
   else if (elt_stride < 0)
@@ -210,14 +217,7 @@ value_subscripted_rvalue (struct value *
 
   if (index < lowerbound || (!TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (array_type)
 			     && elt_offs >= type_length_units (array_type)))
-    {
-      if (type_not_associated (array_type))
-        error (_("no such vector element (vector not associated)"));
-      else if (type_not_allocated (array_type))
-        error (_("no such vector element (vector not allocated)"));
-      else
-        error (_("no such vector element"));
-    }
+    error (_("no such vector element"));
 
   if (VALUE_LVAL (array) == lval_memory && value_lazy (array))
     v = allocate_value_lazy (elt_type);