1 files changed, 77 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/expressions/assignment/destructuring/keyed-destructuring-property-reference-target-evaluation-order.js b/js/src/tests/test262/language/expressions/assignment/destructuring/keyed-destructuring-property-reference-target-evaluation-order.js
new file mode 100644
index 0000000000..3b610f6035
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/assignment/destructuring/keyed-destructuring-property-reference-target-evaluation-order.js
@@ -0,0 +1,77 @@
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-runtime-semantics-keyeddestructuringassignmentevaluation
+description: >
+    Ensure correct evaluation order when destructuring target is property reference.
+info: |
+    12.15.5.2 Runtime Semantics: DestructuringAssignmentEvaluation
+
+    AssignmentProperty : PropertyName : AssignmentElement
+
+    1. Let name be the result of evaluating PropertyName.
+    2. ReturnIfAbrupt(name).
+    3. Return the result of performing KeyedDestructuringAssignmentEvaluation of
+       AssignmentElement with value and name as the arguments. 
+
+    12.15.5.4 Runtime Semantics: KeyedDestructuringAssignmentEvaluation
+
+    1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an ArrayLiteral, then
+        a. Let lref be the result of evaluating DestructuringAssignmentTarget.
+        b. ReturnIfAbrupt(lref).
+    2. Let v be ? GetV(value, propertyName).
+    ...
+    4. Else, let rhsValue be v.
+    ...
+    7. Return ? PutValue(lref, rhsValue).
+includes: [compareArray.js]
+---*/
+
+
+var log = [];
+
+function source() {
+    log.push("source");
+    return {
+        get p() {
+            log.push("get");
+        }
+    };
+}
+function target() {
+    log.push("target");
+    return {
+        set q(v) {
+            log.push("set");
+        }
+    };
+}
+function sourceKey() {
+    log.push("source-key");
+    return {
+        toString: function() {
+            log.push("source-key-tostring");
+            return "p";
+        }
+    };
+}
+function targetKey() {
+    log.push("target-key");
+    return {
+        toString: function() {
+            log.push("target-key-tostring");
+            return "q";
+        }
+    };
+}
+
+({[sourceKey()]: target()[targetKey()]} = source());
+
+assert.compareArray(log, [
+    "source", "source-key", "source-key-tostring",
+    "target", "target-key", "target-key-tostring",
+    "get", "set",
+]);
+
+reportCompare(0, 0);