--- sml/trunk/src/cm/util/dyn-tstamp.sml	1999/05/28 09:43:39	301
+++ sml/trunk/src/cm/util/dyn-tstamp.sml	1999/05/29 03:19:59	302
@@ -42,7 +42,11 @@
 
     fun noshare s = NOSHARE (StringSet.singleton s)
 
+    (* The only time we can encounter an old result of NOSHARE is
+     * during the same run of "make".  In this case, the old value
+     * certainly cannot be outdated. *)
     fun outdated { context = SHARE c, oldresult = SHARE r } = c > r
+      | outdated { oldresult = NOSHARE _, ... } = false
       | outdated _ = true
 
     fun join (SHARE x, SHARE y) = SHARE (if x > y then x else y)

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	<div class="error">does not end with &lt;/html&gt; tag</div>
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	<div class="info">The output has ended thus: false
       | outdated _ = true
 
     fun join (SHARE x, SHARE y) = SHARE (if x &gt; y then x else y)</div>
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