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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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tree10027f336435511475e392454359edea8e25895d /js/src/tests/js1_8_5/regress/regress-554955-6.js
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Add m-esr52 at 52.6.0
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+/* -*- indent-tabs-mode: nil; js-indent-level: 4 -*- */
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var v="global";
+function f(a) {
+ // This eval could extend f's call object. However, the call object has
+ // not yet been marked as a delegate at this point, so no scope chain
+ // purge takes place when it is extended.
+ eval(a);
+ {
+ let b=3;
+ // This eval causes the cloned block object to be added to the
+ // scope chain. The block needs a unique shape: its parent call
+ // could acquire bindings for anything without affecting the global
+ // object's shape, so it's up to the block's shape to mismatch all
+ // property cache entries for prior blocks.
+ eval("");
+ return v;
+ };
+}
+
+// Call the function once, to cache a reference to the global v from within
+// f's lexical block.
+assertEq("global", f(""));
+
+// Call the function again, adding a binding to the call, and ensure that
+// we do not see any property cache entry created by the previous reference
+// that would direct us to the global definition.
+assertEq("local", f("var v='local'"));
+
+// Similarly,but with a doubly-nested block; make sure everyone gets marked.
+function f2(a) {
+ eval(a);
+ {
+ let b=3;
+ {
+ let c=4;
+ eval("");
+ return v;
+ };
+ };
+}
+
+assertEq("global", f2(""));
+assertEq("local", f2("var v='local'"));
+
+reportCompare(true, true);