An error reporting system within the operating system of a computer that provides error reporting and/or debugging for managed applications. The error reporting service supports a registration programming interface through which applications that use non-native or non-standard error reporting functions can register runtime exception modules. A similar interface may be provided for applications to register debuggers. In response to a failure, such as a crash or an application hang, the error reporting service can poll the registered components to ascertain whether any is adapted for use in conjunction with such a failure. If so, the appropriate registered components can be used to collect failure data and/or debug the failed application. In this way, the error reporting service, and an existing framework that supports aggregation of application error reports, can be customized, including to allow error reporting and debugging of non-native applications.