src/third_party/mozjs-45/js/src/jit-test/tests/gc/bug-945275.js

function TestCase(n) {
  this.name = undefined;
  this.description = undefined;
}
gczeal(7,1);
eval("\
function reportCompare() new TestCase;\
reportCompare();\
Object.defineProperty(Object.prototype, 'name', {});\
reportCompare();\
");