From fd26bd9bef46dca9e356a18cc590d60882d297d1 Mon Sep 17 00:00:00 2001
From: joboet <jonasboettiger@icloud.com>
Date: Fri, 19 Jun 2026 13:27:50 +0200
Subject: [PATCH] std: use correct low surrogate range in Windows standard I/O
 code

---
 library/std/src/sys/stdio/windows.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/std/src/sys/stdio/windows.rs b/library/std/src/sys/stdio/windows.rs
index 62ec115d7b0cb..475a0592528b4 100644
--- a/library/std/src/sys/stdio/windows.rs
+++ b/library/std/src/sys/stdio/windows.rs
@@ -222,7 +222,7 @@ fn write_valid_utf8_to_console(handle: c::HANDLE, utf8: &str) -> io::Result<usiz
         // write the missing surrogate out now.
         // Buffering it would mean we have to lie about the number of bytes written.
         let first_code_unit_remaining = utf16[written];
-        if matches!(first_code_unit_remaining, 0xDCEE..=0xDFFF) {
+        if matches!(first_code_unit_remaining, 0xDC00..=0xDFFF) {
             // low surrogate
             // We just hope this works, and give up otherwise
             let _ = write_u16s(handle, &utf16[written..written + 1]);
@@ -234,7 +234,7 @@ fn write_valid_utf8_to_console(handle: c::HANDLE, utf8: &str) -> io::Result<usiz
             count += match ch {
                 0x0000..=0x007F => 1,
                 0x0080..=0x07FF => 2,
-                0xDCEE..=0xDFFF => 1, // Low surrogate. We already counted 3 bytes for the other.
+                0xDC00..=0xDFFF => 1, // Low surrogate. We already counted 3 bytes for the other.
                 _ => 3,
             };
         }