// Test case for Issue 906 // https://github.com/typetools/checker-framework/issues/906 /** @author Michael Grafl */ public class Issue906 { @SuppressWarnings("unchecked") public <B, A extends B> void start(A a, Class<B> cb) { //:: error: (dereference.of.nullable) Class<? extends A> c = (Class<? extends A>) a.getClass(); x(a, c); } private <C, B extends C> void x(B a, Class<? extends B> c) {} }