Message::from_reader_many sometimes fails with "failed reading: armor header: not enough bytes" when reading from pipe

[hko-s]

In a loop like this:

while true; do
  echo "hello world" | rsop encrypt nist256.cert | rsop decrypt nist256.tsk
done

Reading the message in the second rsop instance sometimes fails with

Message("failed reading: armor header: not enough bytes")

The failing read uses Message::from_reader_many.

When I run echo "hello world" | rsop encrypt nist256.cert | cat | rsop decrypt nist256.tsk instead (with a cat added to the pipe), the problem goes away.

[hko-s]

I've seen another read failure that might or might not have a similar underlying cause that errored out with not enough bytes in buffer: armor header