From 28639bd6d741ca96f384d85bbf40331664197068 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Thu, 25 Dec 2025 15:36:35 -0800
Subject: std: prevent testing.io from use outside tests

---
 lib/std/testing.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/std/testing.zig')

diff --git a/lib/std/testing.zig b/lib/std/testing.zig
index 9519eeb427..733b54ec19 100644
--- a/lib/std/testing.zig
+++ b/lib/std/testing.zig
@@ -31,7 +31,7 @@ pub var allocator_instance: std.heap.GeneralPurposeAllocator(.{
 };
 
 pub var io_instance: Io.Threaded = undefined;
-pub const io = io_instance.io();
+pub const io = if (builtin.is_test) io_instance.io() else @compileError("not testing");
 
 /// TODO https://github.com/ziglang/zig/issues/5738
 pub var log_level = std.log.Level.warn;
-- 
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