/****************
Compiling this program gives:
[sqr-bug02.diderot:22.32-38] Error: undeclared variable 'foobar'
uncaught exception Fail [Fail: Error in compiling sqr-bug02.diderot]
  raised at common/phase-timer.sml:76.50-76.52
  raised at common/phase-timer.sml:76.50-76.52
  raised at driver/main.sml:27.39-27.76

So there is both the "Error" and the "Fail".
When there is a descriptive Error message, why have
all the uncaught exception stuff?

****************/

real eps = 1.0;
strand sqroot(real val) {
   output real root = val;
   update {
      root = (root + val/root)/2;
      if (|root^2 - val|/val < foobar)
         stabilize;
   }
}
// Strand initialization
initially { sqroot(i) | i in 1..1000 };

<script type="text/javascript">//<![CDATA[
		function toggle_ffErrors() {
			var errorsblock = document.getElementById("ffErrorsBlock");
			var errorsgroup = document.getElementById("ffErrors");
			if (errorsblock.style.display == "none") {
				errorsblock.style.display = "block";
				errorsgroup.style.right = "10px";
			} else {
				errorsblock.style.display = "none";
				errorsgroup.style.right = "300px";
			}
		}
//]]></script>
<div id="ffErrors">
<a href="javascript:toggle_ffErrors();">Click to toggle</a>
<div id="ffErrorsBlock">
	<div class="error">does not end with &lt;/html&gt; tag</div>
	<div class="error">does not end with &lt;/body&gt; tag</div>
	<div class="info">The output has ended thus:  foobar)
         stabilize;
   }
}
// Strand initialization
initially { sqroot(i) | i in 1..1000 };</div>
</div></div>
</body></html>