diff -up ksh-20130214/src/cmd/ksh93/sh/jobs.c.fixkill ksh-20130214/src/cmd/ksh93/sh/jobs.c

--- ksh-20130214/src/cmd/ksh93/sh/jobs.c.fixkill	2012-09-26 17:43:04.000000000 +0200

+++ ksh-20130214/src/cmd/ksh93/sh/jobs.c	2013-02-22 16:38:05.080161740 +0100

@@ -1104,6 +1104,8 @@ static struct process *job_bystring(regi

 int job_kill(register struct process *pw,register int sig)

 {

+	if(pw==0)

+		goto error;

 	Shell_t	*shp = pw->p_shp;

 	register pid_t pid;

 	register int r;

@@ -1127,8 +1129,6 @@ int job_kill(register struct process *pw

 #endif	/* SIGTSTP */

 	job_lock();

 	errno = ECHILD;

-	if(pw==0)

-		goto error;

 	pid = pw->p_pid;

 #if SHOPT_COSHELL

 	if(pw->p_cojob)