Index: vm_eval.c
===================================================================
--- vm_eval.c	(revision 22918)
+++ vm_eval.c	(working copy)
@@ -1127,7 +1127,7 @@
     return yield_under(mod, mod, rb_ary_new4(argc, argv));
 }
 
-NORETURN(static VALUE rb_f_throw _((int, VALUE *)));
+NORETURN(static void rb_f_throw _((int, VALUE *)));
 
 /*
  *  call-seq:
@@ -1141,7 +1141,7 @@
  *  <code>Kernel::catch</code>.
  */
 
-static VALUE
+static void
 rb_f_throw(int argc, VALUE *argv)
 {
     VALUE tag, value;
@@ -1164,9 +1164,6 @@
     th->errinfo = NEW_THROW_OBJECT(tag, 0, TAG_THROW);
 
     JUMP_TAG(TAG_THROW);
-#ifndef __GNUC__
-    return Qnil;		/* not reached */
-#endif
 }
 
 void
@@ -1453,7 +1450,7 @@
     rb_define_global_function("block_given?", rb_f_block_given_p, 0);
 
     rb_define_global_function("catch", rb_f_catch, -1);
-    rb_define_global_function("throw", rb_f_throw, -1);
+    rb_define_global_function("throw", (VALUE (*)())rb_f_throw, -1);
 
     rb_define_global_function("loop", rb_f_loop, 0);