Fix issue 1415 - allow surrogate pair codes in decodeURIComponent.

test/mjsunit/regress/regress-1415.js

+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
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+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Surrogate pair range.
+// U+D800
+assertThrows(function(){ decodeURIComponent("%ED%A0%80"); }, URIError);
+// U+DBFF
+assertThrows(function(){ decodeURIComponent("%ED%AF%BF"); }, URIError);
+// U+DC00
+assertThrows(function(){ decodeURIComponent("%ED%B0%80"); }, URIError);
+// U+DFFF
+assertThrows(function(){ decodeURIComponent("%ED%BF%BF"); }, URIError);
+
+// Overlong encodings
+// U+007F in two bytes.
+assertThrows(function(){ decodeURIComponent("%C1%BF"); }, URIError);
+// U+07FF in three bytes.
+assertThrows(function(){ decodeURIComponent("%E0%9F%BF"); }, URIError);