Re: spurious eof to M-x shell child stdin

[Richard Stallman]

This is a problem which I believe has no solution.  It is due to the
limited size of the tty buffer.  The buffer gets full, because the
program won't read anything until it gets a newline, so Emacs can't
send the rest of the characters.

Emacs sends an EOF, hoping that will make the program read the text
and open up space in the buffer.  This is in send_process.

It could drop those characters.  It could hang.  But I don't know of
any alternative that is clearly better than what it does now.