From 45f6a64d5ef3bd5bd390811165255f1cbe602f36 Mon Sep 17 00:00:00 2001
From: Dario Nieuwenhuis <dirbaio@dirbaio.net>
Date: Mon, 14 Apr 2025 14:37:09 +0200
Subject: [PATCH] nb: do not swallow errors in fmt::Write.

---
 embedded-hal-nb/src/serial.rs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/embedded-hal-nb/src/serial.rs b/embedded-hal-nb/src/serial.rs
index 6b4d7903..e51085cf 100644
--- a/embedded-hal-nb/src/serial.rs
+++ b/embedded-hal-nb/src/serial.rs
@@ -124,10 +124,9 @@ where
 {
     #[inline]
     fn write_str(&mut self, s: &str) -> core::fmt::Result {
-        let _ = s
-            .bytes()
-            .map(|c| nb::block!(self.write(Word::from(c))))
-            .next_back();
+        for c in s.bytes() {
+            nb::block!(self.write(Word::from(c))).map_err(|_| core::fmt::Error)?;
+        }
         Ok(())
     }
 }