Update nightly Rust used in CI (#11755)

* Update nightly Rust used in CI

Keeping it up-to-date

prtest:full

* Fix unused warnings on nightly

* Rename rustdoc feature

* Adjust some removals

Author: alexcrichton

.github/actions/install-rust/action.yml

@@ -32,7 +32,7 @@ runs:
         elif [ "${{ inputs.toolchain }}" = "msrv" ]; then
           echo "version=1.$msrv.0" >> "$GITHUB_OUTPUT"
         elif [ "${{ inputs.toolchain }}" = "wasmtime-ci-pinned-nightly" ]; then
-          echo "version=nightly-2025-08-06" >> "$GITHUB_OUTPUT"
+          echo "version=nightly-2025-09-29" >> "$GITHUB_OUTPUT"
         else
           echo "version=${{ inputs.toolchain }}" >> "$GITHUB_OUTPUT"
         fi

cranelift/codegen/src/lib.rs

@@ -1,7 +1,7 @@
 //! Cranelift code generation library.
 #![deny(missing_docs)]
 // Display feature requirements in the documentation when building on docs.rs
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(docsrs, feature(doc_cfg))]
 #![no_std]
 // Various bits and pieces of this crate might only be used for one platform or
 // another, but it's not really too useful to learn about that all the time. On

crates/c-api/src/linker.rs

@@ -46,6 +46,7 @@ macro_rules! to_str {
     };
 }
 
+#[cfg(feature = "async")]
 pub(crate) use to_str;
 
 #[unsafe(no_mangle)]

crates/c-api/src/vec.rs

@@ -148,6 +148,7 @@ macro_rules! declare_vecs {
     )*};
 }
 
+#[cfg(feature = "async")]
 pub(crate) use declare_vecs;
 
 declare_vecs! {

crates/wasi-http/src/lib.rs

@@ -218,7 +218,7 @@
 #![deny(missing_docs)]
 #![doc(test(attr(deny(warnings))))]
 #![doc(test(attr(allow(dead_code, unused_variables, unused_mut))))]
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(docsrs, feature(doc_cfg))]
 
 mod error;
 mod http_impl;

crates/wasi/src/lib.rs

@@ -1,4 +1,4 @@
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(docsrs, feature(doc_cfg))]
 
 //! # Wasmtime's WASI Implementation
 //!

crates/wasmtime/src/lib.rs

@@ -279,7 +279,7 @@
 #![deny(missing_docs)]
 #![doc(test(attr(deny(warnings))))]
 #![doc(test(attr(allow(dead_code, unused_variables, unused_mut))))]
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(docsrs, feature(doc_cfg))]
 // NB: this list is currently being burned down to remove all features listed
 // here to get warnings in all configurations of Wasmtime.
 #![cfg_attr(

pulley/src/lib.rs

@@ -1,6 +1,6 @@
 //! The pulley bytecode for fast interpreters.
 
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(docsrs, feature(doc_cfg))]
 #![cfg_attr(pulley_tail_calls, feature(explicit_tail_calls))]
 #![cfg_attr(pulley_tail_calls, allow(incomplete_features, unstable_features))]
 #![deny(missing_docs)]