Weld SE applications can crash when:

1. Constructor injection is used
2. The class constructor calls a super class method

Typically there is a NullPointerException at the call site.

Using org.jboss.weld.development=true seems to trigger the generation of proxies that I don't see when it is false. And the proxy generation is incomplete?

The demo actually crashes in Weld SE code, but I have observed my own code crashing in a similar way.