From dc4035e6fbcdf6b4a2e7563b962c1ac2c40f4904 Mon Sep 17 00:00:00 2001
From: oech3 <79379754+oech3@users.noreply.github.com>
Date: Mon, 31 Aug 2026 15:36:32 +0900
Subject: [PATCH] nl: show allowed range when -i/-l negative_num is given

---
 src/uu/nl/src/nl.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/uu/nl/src/nl.rs b/src/uu/nl/src/nl.rs
index c94a684c168..b94d1646eb4 100644
--- a/src/uu/nl/src/nl.rs
+++ b/src/uu/nl/src/nl.rs
@@ -329,7 +329,9 @@ pub fn uu_app() -> Command {
                 .long(options::LINE_INCREMENT)
                 .help(translate!("nl-help-line-increment"))
                 .value_name("NUMBER")
-                .value_parser(clap::value_parser!(i64)),
+                // show range of allowed value when -NUM is passed
+                .allow_hyphen_values(true)
+                .value_parser(clap::value_parser!(i64).range(0..)),
         )
         .arg(
             Arg::new(options::JOIN_BLANK_LINES)
@@ -337,6 +339,8 @@ pub fn uu_app() -> Command {
                 .long(options::JOIN_BLANK_LINES)
                 .help(translate!("nl-help-join-blank-lines"))
                 .value_name("NUMBER")
+                // show range of allowed value when -NUM is passed
+                .allow_hyphen_values(true)
                 .value_parser(clap::value_parser!(u64)),
         )
         .arg(