In file included from ../../common/sys/model.h:35:0,
                 from ../../common/sys/resource.h:221,
                 from ../../common/sys/user.h:73,
                 from ../../common/sys/proc.h:36,
                 from ../../common/sys/systm.h:40,
                 from ../../common/sys/scsi/scsi_types.h:56,
                 from ../../common/sys/scsi/scsi.h:36,
                 from ../../common/io/scsi/targets/st.c:36:
../../common/io/scsi/targets/st.c: In function 'st_doattach':
../../common/io/scsi/targets/st.c:1671:33: error: comparison between pointer and
 integer [-Werror]
  ASSERT(geterror(un->un_rqs_bp) == NULL);
                                 ^
../../common/sys/debug.h:59:29: note: in definition of macro 'ASSERT'
 #define ASSERT(EX) ((void)((EX) || assfail(#EX, __FILE__, __LINE__)))
                             ^~
cc1: all warnings being treated as errors