From c0fa69c9cb7baa5ab07fd5d830fa5be33ed717d4 Mon Sep 17 00:00:00 2001
From: Martijn Dekker <martijn@inlv.org>
Date: Fri, 15 Sep 2023 03:05:16 +0100
Subject: [PATCH] fun/man: suppress spurious error msg

When doing something like 'man src/cmd/ksh93/sh.1', the 'unset -f'
in builtin_has_selfdoc() complained of an invalid function name.
Just suppress that so it is silently ignored.
---
 src/cmd/ksh93/fun/man | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cmd/ksh93/fun/man b/src/cmd/ksh93/fun/man
index e626b6e2e0b4..538b484a907f 100755
--- a/src/cmd/ksh93/fun/man
+++ b/src/cmd/ksh93/fun/man
@@ -59,7 +59,7 @@ namespace man
 
 	builtin_has_selfdoc()
 	{
-		[[ $(unset -f -- "$1"; whence -t -- "$1") == builtin ]] \
+		[[ $(unset -f -- "$1" 2>/dev/null; whence -t -- "$1") == builtin ]] \
 			&& [[ ! $1 =~ ^(:|true|false|echo)$ \
 			&& $'\n'$(builtin)$'\n' == *$'\n'"$(unset -f -- "$1"; whence -- "$1")"$'\n'* ]]
 	}