From 69e18de58f08ba7e1eae09a8c621cb2b7846b453 Mon Sep 17 00:00:00 2001
From: Martijn Dekker <martijn@inlv.org>
Date: Tue, 2 Feb 2021 05:24:11 +0000
Subject: [PATCH] edit.c: Fix history generation if there are zero arguments

This applies a fix from OpenSUSE:
https://build.opensuse.org/package/view_file/shells/ksh/ksh93-reg.dif
---
 src/cmd/ksh93/edit/edit.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/cmd/ksh93/edit/edit.c b/src/cmd/ksh93/edit/edit.c
index 04d710b19..58af3577e 100644
--- a/src/cmd/ksh93/edit/edit.c
+++ b/src/cmd/ksh93/edit/edit.c
@@ -1762,8 +1762,13 @@ int ed_histgen(Edit_t *ep,const char *pattern)
 			mplast->next = mp;
 		mplast->next = 0;
 	}
-	ep->hlist = (Histmatch_t**)argv;
-	ep->hfirst = ep->hlist?ep->hlist[0]:0;
+	if (argv)
+	{
+		ep->hlist = (Histmatch_t**)argv;
+		ep->hfirst = ep->hlist?ep->hlist[0]:0;
+	}
+	else
+		ep->hfirst = 0;
 	return(ep->hmax=ac);
 }