This proposal is withdrawn, in favor of a proposal for Error stacks.

README.md

@@ -3,7 +3,7 @@ ECMAScript Proposal, specs, and reference implementation for `Error.isError`
 
 Spec drafted by [@ljharb](https://github.com/ljharb).
 
-This proposal is currently seeking [stage 0](https://github.com/tc39/ecma262) of the [process](https://tc39.github.io/process-document/).
+This proposal is currently [withdrawn from stage 0](https://github.com/tc39/ecma262/withdrawn-proposals.md) of the [process](https://tc39.github.io/process-document/).
 
 ## Rationale
 I brought up concerns to the committee about `Symbol.toStringTag`, and how previously reliable and unspoofable `Object#toString` calls would now no longer be reliable. The committee consensus was that as long as there were prototype methods for all builtins that, at the least, threw an error when an internal slot was not present, that would be sufficient to serve as a reliable branding test.

index.html

@@ -24,7 +24,7 @@
 			</ol>
 		</div>
 	</div>
-	<h1 class="version">Stage 0 Draft / November 19, 2015</h1>
+	<h1 class="version">Stage 0 (withdrawn) Draft / March 29, 2016</h1>
 	<h1 class="title">Error.isError</h1>
 	<emu-clause aoid="IsError">
 		<h1><span class="secnum">1</span>IsError( argument )<span class="utils"><span class="anchor"><a href="#">#</a></span></span></h1>
@@ -68,7 +68,7 @@ <h1><span class="secnum">2</span>Error.isError( arg )<span class="utils"><span c
 		<h1><span class="secnum">A</span>Copyright &amp; Software License<span class="utils"><span class="anchor"><a href="#sec-copyright-and-software-license">#</a></span></span></h1>
 
 		<h2>Copyright Notice</h2>
-		<p>© 2015 Jordan Harband</p>
+		<p>© 2016 Jordan Harband</p>
 
 		<h2>Software License</h2>
 		<p>All Software contained in this document ("Software") is protected by copyright and is being made available under the "BSD License", included below. This Software may be subject to third party rights (rights from parties other than Ecma International), including patent rights, and no licenses under such third party rights are granted under this license even if the third party concerned is a member of Ecma International. SEE THE ECMA CODE OF CONDUCT IN PATENT MATTERS AVAILABLE AT http://www.ecma-international.org/memento/codeofconduct.htm FOR INFORMATION REGARDING THE LICENSING OF PATENT CLAIMS THAT ARE REQUIRED TO IMPLEMENT ECMA INTERNATIONAL STANDARDS.</p>

spec.emu

@@ -5,7 +5,7 @@
 <script src="./spec.js"></script>
 <pre class="metadata">
 title: Error.isError
-stage: 0
+stage: 0 (withdrawn)
 contributors: Jordan Harband
 </pre>
 <emu-clause aoid="IsError">