js/src/jit-test/tests/debug/Environment-identity-04.js

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1 // Observably different visits to the same with-statement produce distinct Environments.
2
3 var g = newGlobal();
4 g.eval("function f(a, obj) { with (obj) return function () { return a; }; }");
5 var dbg = Debugger(g);
6 var hits = 0;
7 dbg.onDebuggerStatement = function (frame) {
8 // Even though the two visits to the with-statement have the same target
9 // object, Math, the environments are observably different.
10 var f1 = frame.eval("f(1, Math);").return;
11 var f2 = frame.eval("f(2, Math);").return;
12 assertEq(f1.environment !== f2.environment, true);
13 assertEq(f1.object, f2.object);
14 assertEq(f1.call().return, 1);
15 assertEq(f2.call().return, 2);
16 hits++;
17 };
18 g.eval("debugger;");
19 assertEq(hits, 1);

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