From a060344c6b406be00132adbcf768a8de6dfc89a9 Mon Sep 17 00:00:00 2001
From: Tomasz Guz <tomasz.guz@gmail.com>
Date: Thu, 10 Jul 2025 14:48:52 +0200
Subject: [PATCH] uutests: improve error message for non-empty stderr

---
 tests/uutests/src/lib/util.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tests/uutests/src/lib/util.rs b/tests/uutests/src/lib/util.rs
index 981bce8e2..3fa3ed477 100644
--- a/tests/uutests/src/lib/util.rs
+++ b/tests/uutests/src/lib/util.rs
@@ -695,7 +695,11 @@ impl CmdResult {
     #[track_caller]
     pub fn fails_silently(&self) -> &Self {
         assert!(!self.succeeded());
-        assert!(self.stderr.is_empty());
+        assert!(
+            self.stderr.is_empty(),
+            "Expected stderr to be empty, but it's:\n{}",
+            self.stderr_str()
+        );
         self
     }