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diff --git a/deps/v8/test/mjsunit/es6/block-const-assign-sloppy.js b/deps/v8/test/mjsunit/es6/block-const-assign-sloppy.js
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+// 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.
+//     * Neither the name of Google Inc. nor the names of its
+//       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.
+
+// Test that we throw early syntax errors in harmony mode
+// when using an immutable binding in an assigment or with
+// prefix/postfix decrement/increment operators.
+
+const decls = [
+  // Const declaration.
+  function(use) { return "const c = 1; " + use + ";" }, TypeError,
+  function(use) { return "const x = 0, c = 1; " + use + ";" }, TypeError,
+  function(use) { return "const c = 1, x = (" + use + ");" }, TypeError,
+  function(use) { return use + "; const c = 1;" }, ReferenceError,
+  function(use) { return use + "; const x = 0, c = 1;" }, ReferenceError,
+  function(use) { return "const x = (" + use + "), c = 1;" }, ReferenceError,
+  function(use) { return "const c = (" + use + ");" }, ReferenceError,
+
+  // Function expression.
+  function(use) { return "(function c() { " + use + "; })();"; }, TypeError,
+  // TODO(rossberg): Once we have default parameters, test using 'c' there.
+
+  // Class expression.
+  function(use) {
+    return "new class c { constructor() { " + use + " } };";
+  }, TypeError,
+  function(use) {
+    return "(new class c { m() { " + use + " } }).m();";
+  }, TypeError,
+  function(use) {
+    return "(new class c { get a() { " + use + " } }).a;";
+  }, TypeError,
+  function(use) {
+    return "(new class c { set a(x) { " + use + " } }).a = 0;";
+  }, TypeError,
+  function(use) {
+    return "(class c { static m() { " + use + " } }).s();";
+  }, TypeError,
+  function(use) {
+    return "(class c extends (" + use + ") {});";
+  }, ReferenceError,
+  function(use) {
+    return "(class c { [" + use + "]() {} });";
+  }, ReferenceError,
+  function(use) {
+    return "(class c { get [" + use + "]() {} });";
+  }, ReferenceError,
+  function(use) {
+    return "(class c { set [" + use + "](x) {} });";
+  }, ReferenceError,
+  function(use) {
+    return "(class c { static [" + use + "]() {} });";
+  }, ReferenceError,
+
+  // For loop.
+  function(use) {
+    return "for (const c = 0; " + use + ";) {}"
+  }, TypeError,
+  function(use) {
+    return "for (const x = 0, c = 0; " + use + ";) {}"
+  }, TypeError,
+  function(use) {
+    return "for (const c = 0; ; " + use + ") {}"
+  }, TypeError,
+  function(use) {
+    return "for (const x = 0, c = 0; ; " + use + ") {}"
+  }, TypeError,
+  function(use) {
+    return "for (const c = 0; ;) { " + use + "; }"
+  }, TypeError,
+  function(use) {
+    return "for (const x = 0, c = 0; ;) { " + use + "; }"
+  }, TypeError,
+  function(use) {
+    return "for (const c in {a: 1}) { " + use + "; }"
+  }, TypeError,
+  function(use) {
+    return "for (const c of [1]) { " + use + "; }"
+  }, TypeError,
+  function(use) {
+    return "for (const x = (" + use + "), c = 0; ;) {}"
+  }, ReferenceError,
+  function(use) {
+    return "for (const c = (" + use + "); ;) {}"
+  }, ReferenceError,
+]
+
+let uses = [
+  'c = 1',
+  'c += 1',
+  '++c',
+  'c--',
+];
+
+let declcontexts = [
+  function(decl) { return decl; },
+  function(decl) { return "eval(\'" + decl + "\')"; },
+  function(decl) { return "{ " + decl + " }"; },
+  function(decl) { return "(function() { " + decl + " })()"; },
+];
+
+let usecontexts = [
+  function(use) { return use; },
+  function(use) { return "eval(\"" + use + "\")"; },
+  function(use) { return "(function() { " + use + " })()"; },
+  function(use) { return "(function() { eval(\"" + use + "\"); })()"; },
+  function(use) { return "eval(\"(function() { " + use + "; })\")()"; },
+];
+
+function Test(program, error) {
+  program = "'use strict'; " + program;
+  try {
+    print(program, "  // throw " + error.name);
+    eval(program);
+  } catch (e) {
+    assertInstanceof(e, error);
+    if (e === TypeError) {
+      assertTrue(e.toString().indexOf("Assignment to constant variable") >= 0);
+    }
+    return;
+  }
+  assertUnreachable();
+}
+
+for (var d = 0; d < decls.length; d += 2) {
+  for (var u = 0; u < uses.length; ++u) {
+    for (var o = 0; o < declcontexts.length; ++o) {
+      for (var i = 0; i < usecontexts.length; ++i) {
+        Test(declcontexts[o](decls[d](usecontexts[i](uses[u]))), decls[d + 1]);
+      }
+    }
+  }
+}