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If the output from a code snippet is `0` without a newline, Perl treats this as a false value. When Guest::process_command() returns a false value, that signals to guest-server::serial_server() that it is the parent returning and so it will not send the result back to the host. However, `0\n` is a true value. Solution: always append a final newline to the guest output. |
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Guest.pm |