http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=50863

--- src/tty.c.orig	2014-06-18 19:07:45 UTC

+++ src/tty.c

@@ -499,6 +499,9 @@ tty_setup(EditLine *el)

 	if (el->el_flags & EDIT_DISABLED)

 		return 0;

+	if (el->el_tty.t_initialized)

+		return -1;

+

 	if (!isatty(el->el_outfd)) {

 #ifdef DEBUG_TTY

 		(void) fprintf(el->el_errfile, "%s: isatty: %s\n", __func__,

@@ -558,6 +561,7 @@ tty_setup(EditLine *el)

 	tty__setchar(&el->el_tty.t_ed, el->el_tty.t_c[ED_IO]);

 	tty_bind_char(el, 1);

+	el->el_tty.t_initialized = 1;

 	return 0;

 }

@@ -567,6 +571,7 @@ tty_init(EditLine *el)

 	el->el_tty.t_mode = EX_IO;

 	el->el_tty.t_vdisable = _POSIX_VDISABLE;

+	el->el_tty.t_initialized = 0;

 	(void) memcpy(el->el_tty.t_t, ttyperm, sizeof(ttyperm_t));

 	(void) memcpy(el->el_tty.t_c, ttychar, sizeof(ttychar_t));

 	return tty_setup(el);

@@ -580,6 +585,9 @@ protected void

 /*ARGSUSED*/

 tty_end(EditLine *el)

 {

+	if (!el->el_tty.t_initialized)

+		return;

+

 	if (tty_setty(el, TCSAFLUSH, &el->el_tty.t_or) == -1) {

 #ifdef DEBUG_TTY

 		(void) fprintf(el->el_errfile,

--- src/tty.h.orig	2014-06-18 16:05:56 UTC

+++ src/tty.h

@@ -474,8 +474,9 @@ typedef struct {

     int t_tabs;

     int t_eight;

     speed_t t_speed;

-    int t_mode;

+    unsigned char t_mode;

     unsigned char t_vdisable;

+    unsigned char t_initialized;

 } el_tty_t;