QScriptEngine::collectGarbage() does not delete C++ objects wrapped by QScriptEngine::newQObject()

QScriptEngine's garbage collection appears to not delete C++ objects wrapped as QScriptValues by a call to QScriptEngine::newQObject(), when QScriptEngine::AutoOwnership or ScriptOwnership are used.

The attached example (QtScriptGCBugReport.tar.gz) executes a script that repeatedly instantiates C++ objects of type A. It then attempts garbage collection both from a call in the script to gc() when those objects have gone out of scope, and through a direct call to QScriptEngine::collectGarbage() after the script execution is complete. However, the first time an instance of A is destructed is when the QScriptEngine is destructed.