michael@0: // defineProperty can make a non-configurable writable property non-writable
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: var g = newGlobal();
michael@0: var dbg = new Debugger;
michael@0: var gw = dbg.addDebuggee(g);
michael@0: gw.defineProperty("p", {writable: true, value: 1});
michael@0: gw.defineProperty("p", {writable: false});
michael@0: g.p = 4;
michael@0: assertEq(g.p, 1);