diff --git a/js/src/jsparse.cpp b/js/src/jsparse.cpp
index d36ce1dae230..b4dea33ed1ad 100644
--- a/js/src/jsparse.cpp
+++ b/js/src/jsparse.cpp
@@ -8066,18 +8066,23 @@ Parser::primaryExpr(TokenKind tt, JSBool afterDot)
             return NULL;
         pn->pn_num = (jsint) tokenStream.currentToken().t_dval;
         tt = tokenStream.getToken(TSF_OPERAND);
-        if (tt == TOK_USESHARP || tt == TOK_DEFSHARP ||
-#if JS_HAS_XML_SUPPORT
-            tt == TOK_STAR || tt == TOK_AT ||
-            tt == TOK_XMLSTAGO /* XXXbe could be sharp? */ ||
-#endif
-            tt == TOK_STRING || tt == TOK_NUMBER || tt == TOK_PRIMARY) {
-            reportErrorNumber(NULL, JSREPORT_ERROR, JSMSG_BAD_SHARP_VAR_DEF);
-            return NULL;
-        }
         pn->pn_kid = primaryExpr(tt, JS_FALSE);
         if (!pn->pn_kid)
             return NULL;
+        if (PN_TYPE(pn->pn_kid) == TOK_USESHARP ||
+            PN_TYPE(pn->pn_kid) == TOK_DEFSHARP ||
+#if JS_HAS_XML_SUPPORT
+            PN_TYPE(pn->pn_kid) == TOK_XMLCOMMENT ||
+            PN_TYPE(pn->pn_kid) == TOK_XMLCDATA ||
+            PN_TYPE(pn->pn_kid) == TOK_XMLPTAGC ||
+            PN_TYPE(pn->pn_kid) == TOK_XMLELEM ||
+#endif
+            PN_TYPE(pn->pn_kid) == TOK_STRING ||
+            PN_TYPE(pn->pn_kid) == TOK_NUMBER ||
+            PN_TYPE(pn->pn_kid) == TOK_PRIMARY) {
+            reportErrorNumber(pn->pn_kid, JSREPORT_ERROR, JSMSG_BAD_SHARP_VAR_DEF);
+            return NULL;
+        }
         if (!tc->ensureSharpSlots())
             return NULL;
         break;
diff --git a/js/src/tests/e4x/extensions/jstests.list b/js/src/tests/e4x/extensions/jstests.list
index 8f0e6b60d64d..495fa6c0d694 100644
--- a/js/src/tests/e4x/extensions/jstests.list
+++ b/js/src/tests/e4x/extensions/jstests.list
@@ -5,6 +5,7 @@ script regress-313080.js
 script regress-321547.js
 script regress-327534.js
 script regress-327897.js
+script regress-335051.js
 script regress-337226.js
 script regress-352846-01.js
 script regress-352846-02.js
diff --git a/js/src/tests/e4x/extensions/regress-335051.js b/js/src/tests/e4x/extensions/regress-335051.js
new file mode 100644
index 000000000000..6ca5a9091081
--- /dev/null
+++ b/js/src/tests/e4x/extensions/regress-335051.js
@@ -0,0 +1,65 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   rje(a)dbc.dk
+ */
+
+var gTestfile = 'regress-335051.js';
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 335051;
+var summary = 'E4X literals should be acceptable values for sharp variables';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+function testSyntax(syntax, isValid) {
+  var result;
+  try {
+    eval(syntax);
+    result = true;
+  } catch(exception) {
+    if (SyntaxError.prototype.isPrototypeOf(exception)) {
+      result = false;
+    }
+  }
+  reportCompare(isValid, result, "test " + (isValid?"":"in") + "valid syntax: " + syntax);
+}
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+  var oldVersion = false;
+
+  testSyntax("#1={}", true);
+  testSyntax("#1=[]", true);
+  testSyntax("#1=([])", true);
+
+  testSyntax("#1=[1, 2, 3]", true);
+  testSyntax("#1={a:1, b:2}", true);
+
+  testSyntax("#1=function() { }", true);
+  testSyntax("#1=(new Date())", true);
+
+  testSyntax("#1=<a/>", false);
+  testSyntax("#1=<!-- -->", false);
+  testSyntax("#1=<a>b</a>", false);
+  testSyntax("[#1=<a>b</a>, #1#]", false);
+  testSyntax("#1=(<a/>)", false);
+  testSyntax("#1=(<![CDATA[foo]]>)", false);
+
+  testSyntax("#1=123", false);
+  testSyntax("#1='foo'", false);
+  testSyntax("#1=1+2", false);
+  testSyntax("#1=-1", false);
+  testSyntax("#1=(123)", false);
+  testSyntax("#1=true", false);
+
+  exitFunc ('test');
+}