const g = newGlobal({ newCompartment: true }); g.eval(` var x1 = {}; var x2 = { __proto__: null }; `); const dbg = new Debugger(); const gDO = dbg.addDebuggee(g); const x1DO = gDO.makeDebuggeeValue(g.x1); const x2DO = gDO.makeDebuggeeValue(g.x2); // A plain object with default prototype should match `Object` query. const ObjectDO = gDO.makeDebuggeeValue(g.Object); assertEq(dbg.findObjects({ class: ObjectDO }).includes(x1DO), true); // An object with null prototype shouldn't match `Object` query. assertEq(dbg.findObjects({ class: ObjectDO }).includes(x2DO), false);