bug#24531: process-send-string seems to truncate lines over 4096 characters

[talwrii talwrii]

=== Repro ===

i. Download attached el file

ii. Read it to ensure I am not hacking your computer

iii. In the same directory run

emacs -Q --eval '(progn (load-file "line-repro.el") (message (format "%S" (repro))))' -nw --batch

As the last line of output I get

(3005 4100 6006)

I wouild expect this 4100 to be 5005

The third value indicates it is the line that gets truncated rather than the string

=== Version details ===

In GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9) of 2016-04-08 on binet, modified by Debian Windowing system distributor `The X.Org Foundation', version 11.0.11804000 System Description: Debian GNU/Linux testing (stretch) Configured using: `configure --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --with-pop=yes --enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.5/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.5/site-lisp:/usr/share/emacs/site-lisp --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --with-pop=yes --enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.5/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.5/site-lisp:/usr/share/emacs/site-lisp --with-x=yes --with-x-toolkit=gtk3 --with-toolkit-scroll-bars 'CFLAGS=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wall' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2' LDFLAGS=-Wl,-z,relro' Important settings: value of $LANG: en_GB.UTF-8 locale-coding-system: utf-8-unix

line-repro.el
Description: Text Data