From 18fe0e1905fc69cd2eb44a5f72a08391737016e6 Mon Sep 17 00:00:00 2001
From: Aleksei Bavshin <a.bavshin@nginx.com>
Date: Tue, 7 Jan 2025 13:30:36 -0800
Subject: [PATCH] fix: avoid implicit import of `std::prelude`

Conditional `cfg_attr` on `no_std` has an unforeseen consequence:
implicit import of `std::prelude` in the default configuration.
That makes it harder to notice if we accidentally use any `std` types
available from the prelude.
---
 src/lib.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 906af2a..8c5be72 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -32,11 +32,13 @@
 //! # now you can use dynamic modules with the NGINX
 //! ```
 
-// support both std and no_std
-#![cfg_attr(not(feature = "std"), no_std)]
 #![warn(missing_docs)]
+// support both std and no_std
+#![no_std]
 #[cfg(all(not(feature = "std"), feature = "alloc"))]
 extern crate alloc;
+#[cfg(feature = "std")]
+extern crate std;
 
 /// The core module.
 ///