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+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
+description: >
+ Creation of new lexical environment for the initial evaluation of the
+ statement body
+info: |
+ IterationStatement : for ( ForDeclaration of AssignmentExpression ) Statement
+
+ [...]
+ 2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult,
+ lexicalBinding, labelSet).
+
+ 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
+
+ [...]
+ 5. Repeat
+ [...]
+ d. If lhsKind is either assignment or varBinding, then
+ [...]
+ e. Else,
+ i. Assert: lhsKind is lexicalBinding.
+ ii. Assert: lhs is a ForDeclaration.
+ iii. Let iterationEnv be NewDeclarativeEnvironment(oldEnv).
+ iv. Perform BindingInstantiation for lhs passing iterationEnv as the
+ argument.
+ v. Set the running execution context's LexicalEnvironment to
+ iterationEnv.
+ [...]
+features: [let]
+---*/
+
+var probeBefore = function() { return x; };
+let x = 'outside';
+var probeExpr, probeDecl, probeBody;
+
+for (
+ let [x, _, __ = probeDecl = function() { return x; }]
+ of
+ [['inside', probeExpr = function() { typeof x; }]]
+ )
+ probeBody = function() { return x; };
+
+assert.sameValue(probeBefore(), 'outside');
+assert.throws(ReferenceError, probeExpr);
+assert.sameValue(probeDecl(), 'inside', 'reference from ForDeclaration');
+assert.sameValue(probeBody(), 'inside', 'reference from statement body');
+
+reportCompare(0, 0);