--- src/cmd/ksh93/sh/jobs.c~	2007-07-03 19:27:28.000000000 -0700
+++ src/cmd/ksh93/sh/jobs.c	2007-07-03 19:28:02.000000000 -0700
@@ -36,7 +36,7 @@
 #include	"jobs.h"
 #include	"history.h"
 
-#if !defined(WCONTINUED) || !defined(WIFCONTINUED)
+#if !defined(WCONTINUED) || !defined(WIFCONTINUED) || defined(__APPLE__)
 #   undef  WCONTINUED
 #   define WCONTINUED	0
 #   undef  WIFCONTINUED
@@ -1440,7 +1443,7 @@ static struct process *job_unpost(regist
 	if(pw)
 		return(pw);
 	/* all processes complete, unpost job */
-	job_unlink(pwtop);
+	if (pwtop) job_unlink(pwtop);
 	for(pw=pwtop; pw; pw=pw->p_nxtproc)
 	{
 		/* save the exit status for background jobs */
@@ -1469,7 +1472,7 @@ static struct process *job_unpost(regist
 	sfprintf(sfstderr,"ksh: job line %4d: free pid=%d critical=%d job=%d\n",__LINE__,getpid(),job.in_critical,pwtop->p_job);
 	sfsync(sfstderr);
 #endif /* DEBUG */
-	job_free((int)pwtop->p_job);
+	if (pwtop) job_free((int)pwtop->p_job);
 	return((struct process*)0);
 }