From dc433bcacb85e234681b86789b0065342bcb5ae4 Mon Sep 17 00:00:00 2001
From: oech3 <>
Date: Sun, 11 Jan 2026 13:14:54 +0900
Subject: [PATCH] printf 1 > /dev/full is not silent

---
 src/uucore/src/lib/features/format/mod.rs | 2 +-
 tests/by-util/test_printf.rs              | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/uucore/src/lib/features/format/mod.rs b/src/uucore/src/lib/features/format/mod.rs
index 2863407a0..66e4d8bde 100644
--- a/src/uucore/src/lib/features/format/mod.rs
+++ b/src/uucore/src/lib/features/format/mod.rs
@@ -113,7 +113,7 @@ impl Display for FormatError {
             Self::InvalidPrecision(precision) => write!(f, "invalid precision: '{precision}'"),
             // TODO: Error message below needs some work
             Self::WrongSpecType => write!(f, "wrong % directive type was given"),
-            Self::IoError(_) => write!(f, "write error"),
+            Self::IoError(e) => write!(f, "write error: {e}"),
             Self::NoMoreArguments => write!(f, "no more arguments"),
             Self::InvalidArgument(_) => write!(f, "invalid argument"),
             Self::MissingHex => write!(f, "missing hexadecimal number in escape"),
diff --git a/tests/by-util/test_printf.rs b/tests/by-util/test_printf.rs
index 21e638f7c..6afe0330c 100644
--- a/tests/by-util/test_printf.rs
+++ b/tests/by-util/test_printf.rs
@@ -1490,5 +1490,5 @@ fn test_extreme_field_width_overflow() {
     new_ucmd!()
         .args(&["%999999999999999999999999d", "1"])
         .fails_with_code(1)
-        .stderr_only("printf: write error\n");
+        .stderr_contains("printf: write error"); //could contains additional message like "formatting width too large" not in GNU, thats fine.
 }