On 6.1 and -current. run 'pax' without any argment.

$ pax
Abort (core dumped)
Exit 134

$ dmesg | tail -1
pax(81327): syscall 54 "tty"

$ ktrace pax
$ kdump | tail -4
 19681 pax      CALL  ioctl(0,MTIOCGET,0x7f7ffffbd7f0)
 19681 pax      PLDG  ioctl, "tty", errno 1 Operation not permitted
 19681 pax      PSIG  SIGABRT SIG_DFL
 19681 pax      NAMI  "pax.core"

-- 
Matthieu Herrb

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