From 726d2c3093d1a386edbff106070456cf866c0a6a Mon Sep 17 00:00:00 2001
From: janekptacijarabaci <janekptacijarabaci@seznam.cz>
Date: Sun, 18 Mar 2018 09:53:57 +0100
Subject: Remove strict arguments poison pill for "caller" property per ES2017

---
 js/src/tests/ecma_5/Function/arguments-caller-callee.js      | 12 +++++-------
 .../tests/ecma_5/Function/arguments-property-attributes.js   |  8 ++------
 js/src/tests/jstests.list                                    | 10 ++++++++++
 js/src/vm/ArgumentsObject.cpp                                |  6 +-----
 4 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/js/src/tests/ecma_5/Function/arguments-caller-callee.js b/js/src/tests/ecma_5/Function/arguments-caller-callee.js
index 3eda27b49..57efd9eb9 100644
--- a/js/src/tests/ecma_5/Function/arguments-caller-callee.js
+++ b/js/src/tests/ecma_5/Function/arguments-caller-callee.js
@@ -5,7 +5,8 @@
 
 var gTestfile = 'arguments-caller-callee.js';
 var BUGNUMBER = 514563;
-var summary = "arguments.caller and arguments.callee are poison pills in ES5";
+var summary = "arguments.caller and arguments.callee are poison pills in ES5, " +
+              "later changed in ES2017 to only poison pill arguments.callee.";
 
 print(BUGNUMBER + ": " + summary);
 
@@ -31,7 +32,7 @@ function expectTypeError(fun)
 }
 
 function bar() { "use strict"; return arguments; }
-expectTypeError(function barCaller() { bar().caller; });
+assertEq(bar().caller, undefined); // No error when accessing arguments.caller in ES2017+
 expectTypeError(function barCallee() { bar().callee; });
 
 function baz() { return arguments; }
@@ -41,15 +42,12 @@ assertEq(baz().callee, baz);
 // accessor identity
 
 function strictMode() { "use strict"; return arguments; }
-var canonicalTTE = Object.getOwnPropertyDescriptor(strictMode(), "caller").get;
+var canonicalTTE = Object.getOwnPropertyDescriptor(strictMode(), "callee").get;
 
 var args = strictMode();
 
 var argsCaller = Object.getOwnPropertyDescriptor(args, "caller");
-assertEq("get" in argsCaller, true);
-assertEq("set" in argsCaller, true);
-assertEq(argsCaller.get, canonicalTTE);
-assertEq(argsCaller.set, canonicalTTE);
+assertEq(argsCaller, undefined);
 
 var argsCallee = Object.getOwnPropertyDescriptor(args, "callee");
 assertEq("get" in argsCallee, true);
diff --git a/js/src/tests/ecma_5/Function/arguments-property-attributes.js b/js/src/tests/ecma_5/Function/arguments-property-attributes.js
index 994b97ca4..f50c1e6da 100644
--- a/js/src/tests/ecma_5/Function/arguments-property-attributes.js
+++ b/js/src/tests/ecma_5/Function/arguments-property-attributes.js
@@ -56,7 +56,7 @@ var sa = strictArgs(0, 1);
 
 var strictArgProps = Object.getOwnPropertyNames(sa).sort();
 assertEq(strictArgProps.indexOf("callee") >= 0, true);
-assertEq(strictArgProps.indexOf("caller") >= 0, true);
+assertEq(strictArgProps.indexOf("caller") >= 0, false);
 assertEq(strictArgProps.indexOf("0") >= 0, true);
 assertEq(strictArgProps.indexOf("1") >= 0, true);
 assertEq(strictArgProps.indexOf("length") >= 0, true);
@@ -69,11 +69,7 @@ assertEq(strictCalleeDesc.enumerable, false);
 assertEq(strictCalleeDesc.configurable, false);
 
 var strictCallerDesc = Object.getOwnPropertyDescriptor(sa, "caller");
-assertEq(typeof strictCallerDesc.get, "function");
-assertEq(typeof strictCallerDesc.set, "function");
-assertEq(strictCallerDesc.get, strictCallerDesc.set);
-assertEq(strictCallerDesc.enumerable, false);
-assertEq(strictCallerDesc.configurable, false);
+assertEq(strictCallerDesc, undefined);
 
 var strictZeroDesc = Object.getOwnPropertyDescriptor(sa, "0");
 assertEq(strictZeroDesc.value, 0);
diff --git a/js/src/tests/jstests.list b/js/src/tests/jstests.list
index a0f2f08bd..1e23a3da3 100644
--- a/js/src/tests/jstests.list
+++ b/js/src/tests/jstests.list
@@ -46,6 +46,16 @@ skip script test262/ch09/9.3/9.3.1/S9.3.1_A2.js
 skip script test262/ch09/9.3/9.3.1/S9.3.1_A3_T2.js
 skip script test262/ch09/9.3/9.3.1/S9.3.1_A3_T1.js
 
+# ES2017 removed the strict arguments poison pill for the "caller" property
+# (bug 1324208).
+skip script test262/ch13/13.2/S13.2.3_A1.js
+skip script test262/ch10/10.6/10.6-14-1-s.js
+skip script test262/ch10/10.6/10.6-13-b-3-s.js
+skip script test262/ch10/10.6/10.6-14-b-1-s.js
+skip script test262/ch10/10.6/10.6-14-b-4-s.js
+skip script test262/ch10/10.6/10.6-13-b-1-s.js
+skip script test262/ch10/10.6/10.6-13-b-2-s.js
+
 #######################################################################
 # Tests disabled due to jstest limitations wrt imported test262 tests #
 #######################################################################
diff --git a/js/src/vm/ArgumentsObject.cpp b/js/src/vm/ArgumentsObject.cpp
index d01121ef0..717aa1050 100644
--- a/js/src/vm/ArgumentsObject.cpp
+++ b/js/src/vm/ArgumentsObject.cpp
@@ -676,7 +676,7 @@ UnmappedArgumentsObject::obj_resolve(JSContext* cx, HandleObject obj, HandleId i
         if (argsobj->hasOverriddenLength())
             return true;
     } else {
-        if (!JSID_IS_ATOM(id, cx->names().callee) && !JSID_IS_ATOM(id, cx->names().caller))
+        if (!JSID_IS_ATOM(id, cx->names().callee))
             return true;
 
         attrs = JSPROP_PERMANENT | JSPROP_GETTER | JSPROP_SETTER | JSPROP_SHARED;
@@ -709,10 +709,6 @@ UnmappedArgumentsObject::obj_enumerate(JSContext* cx, HandleObject obj)
     if (!HasProperty(cx, argsobj, id, &found))
         return false;
 
-    id = NameToId(cx->names().caller);
-    if (!HasProperty(cx, argsobj, id, &found))
-        return false;
-
     id = SYMBOL_TO_JSID(cx->wellKnownSymbols().iterator);
     if (!HasProperty(cx, argsobj, id, &found))
         return false;
-- 
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