src/third_party/mozjs-45/js/src/jit-test/tests/debug/Object-unsafeDereference-01.js

// Debugger.Object.prototype.unsafeDereference returns the referent directly.

var g = newGlobal();
var dbg = new Debugger();
var gw = dbg.addDebuggee(g);

assertEq(gw.getOwnPropertyDescriptor('Math').value.unsafeDereference(), g.Math);

g.eval('var obj = {}');
assertEq(gw.getOwnPropertyDescriptor('obj').value.unsafeDereference(), g.obj);