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Please pay attention to random failures.
https://mstdn.maud.io/@omasanoritty - Pasting binary data into a Unicode terminal - Unix & Linux Stack Exchange
https://unix.stackexchange.com/questions/41601/pasting-binary-data-into-a-unicode-terminal
> ef bf bd is the UTF-8 encoding of REPLACEMENT CHARACTER (�), which is "used to replace an incoming character whose value is unknown or unrepresentable in Unicode".