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--- a/6/simp.c

+++ b/6/simp.c

@@ -566,6 +566,7 @@

     return r;

 }

+/* gets the byte offset of 'memb' within the aggregate type 'aggr' */

 static size_t offset(Node *aggr, Node *memb)

 {

     Type *ty;

@@ -780,6 +781,7 @@

                           tystr(exprtype(val)), tystr(to));

             }

             break;

+        /* no other destination types are handled as things stand */

         default:

             fatal(val->line, "Bad cast from %s to %s",

                   tystr(exprtype(val)), tystr(to));