Reported by clang:

src\jdk.accessibility\windows\native\libjavaaccessbridge\AccessBridgeATInstance.cpp(150,54): warning: cast to 'void *' from smaller integer type 'DWORD' (aka 'unsigned long') [-Wint-to-void-pointer-cast]
    ret = (HANDLE) _beginthreadex(NULL,0,thread_func,(void *)param,0,(unsigned int *)id);
                                                     ^~~~~~~~~~~~~
src\jdk.accessibility\windows\native\libjavaaccessbridge\AccessBridgeATInstance.cpp(200,94): warning: cast to smaller integer type 'unsigned long' from 'EVENT_STRUCT *' [-Wpointer-to-int-cast]
            HANDLE JavaBridgeThreadHandle = BeginThread(JavaBridgeThread,&JavaBridgeThreadId,(DWORD)event_struct);
                                                                                             ^~~~~~~~~~~~~~~~~~~

The casts lose the top 32 bits of a pointer and may lead to a crash.