From d8460910b47d175fc77ef6fe5e9f8e58e291e2fd Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Fri, 26 Dec 2025 19:36:30 -0800
Subject: [PATCH] std.Io.Threaded: init stderr_writer in streaming mode

---
 lib/std/Io/Threaded.zig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/std/Io/Threaded.zig b/lib/std/Io/Threaded.zig
index 1e37f56365..d6d44aa775 100644
--- a/lib/std/Io/Threaded.zig
+++ b/lib/std/Io/Threaded.zig
@@ -56,6 +56,7 @@ stderr_writer: File.Writer = .{
     .io = undefined,
     .interface = Io.File.Writer.initInterface(&.{}),
     .file = if (is_windows) undefined else .stderr(),
+    .mode = .streaming,
 },
 stderr_mode: Io.Terminal.Mode = .no_color,
 stderr_writer_initialized: bool = false,