From c2e74ed6aaa1a2ba8e817a83ba9e0d31fc7b0e9a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=AA=E3=81=A4=E3=81=8D?= <i@ntk.me>
Date: Sun, 31 Mar 2024 09:10:49 -0700
Subject: [PATCH] Use thread-safe writeln in dart-sdk 3.3

---
 lib/src/io/vm.dart | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/lib/src/io/vm.dart b/lib/src/io/vm.dart
index 1d5c7b561..053b7b349 100644
--- a/lib/src/io/vm.dart
+++ b/lib/src/io/vm.dart
@@ -32,20 +32,11 @@ bool get supportsAnsiEscapes {
 }
 
 void safePrint(Object? message) {
-  _threadSafeWriteLn(io.stdout, message);
+  io.stdout.writeln(message.toString());
 }
 
 void printError(Object? message) {
-  _threadSafeWriteLn(io.stderr, message);
-}
-
-void _threadSafeWriteLn(io.IOSink sink, Object? message) {
-  // This does have performance penality of copying buffer
-  // if message is already a StringBuffer.
-  // https://github.com/dart-lang/sdk/issues/53471.
-  var buffer = StringBuffer(message.toString());
-  buffer.writeln();
-  sink.write(buffer);
+  io.stderr.writeln(message.toString());
 }
 
 String readFile(String path) {