In JDK-8301995, handling of invokedynamic in the constant pool cache was refactored and a regression was introduced in AbstractInterpreter::is_not_reached(). Before the patch the code looked like this:

case Bytecodes::_invokedynamic: {
        assert(invoke_bc.has_index_u4(code), "sanity");
        int method_index = invoke_bc.get_index_u4(code);
        return cpool->invokedynamic_cp_cache_entry_at(method_index)->is_f1_null();
}

The patch introduced this change:

case Bytecodes::_invokedynamic: {
        assert(invoke_bc.has_index_u4(code), "sanity");
        int method_index = invoke_bc.get_index_u4(code);
        return cpool->resolved_indy_entry_at(method_index)->is_resolved();
}
 The new return should be negated to match the pre-patch result.