Update rust toolchain to 2025-10-27 (#85409)

- **Remove now-unnecessary feature flag for new_zeroed_alloc**
- **Remove unused import**
- **Update toolchain to 2025-10-27**

Author: wbinnssmith

crates/next-custom-transforms/src/transforms/named_import_transform.rs

@@ -78,11 +78,11 @@ impl Fold for NamedImportTransform {
 
                 // Create a new import declaration, keep everything the same except the source
                 let mut new_decl = decl.clone();
-                new_decl.src = Box::new(Str {
+                *new_decl.src = Str {
                     span: DUMMY_SP,
                     value: new_src.into(),
                     raw: None,
-                });
+                };
 
                 return new_decl;
             }

crates/next-custom-transforms/src/transforms/server_actions.rs

@@ -3042,6 +3042,7 @@ impl From<Name> for Box<Expr> {
             optional,
         } in value.1.into_iter()
         {
+            #[allow(clippy::replace_box)]
             if is_member {
                 expr = Box::new(Expr::Member(MemberExpr {
                     span: DUMMY_SP,

crates/next-custom-transforms/src/transforms/track_dynamic_imports.rs

@@ -100,7 +100,7 @@ fn make_named_import_esm(args: MakeNamedImportArgs) -> ModuleItem {
     );
     // the import source cannot be parametrized in `quote!()`, so patch it manually
     let decl = item.as_mut_module_decl().unwrap().as_mut_import().unwrap();
-    decl.src = Box::new(source.into());
+    *decl.src = source.into();
     item
 }
 

rust-toolchain.toml

@@ -1,5 +1,5 @@
 # if you update this, also update `.devcontainer/rust/devcontainer-feature.json`
 [toolchain]
-channel = "nightly-2025-09-21"
+channel = "nightly-2025-10-27"
 components = ["rustfmt", "clippy", "rust-analyzer"]
 profile = "minimal"

turbopack/crates/turbo-persistence/src/lib.rs

@@ -1,5 +1,4 @@
 #![feature(once_cell_try)]
-#![feature(new_zeroed_alloc)]
 #![feature(get_mut_unchecked)]
 #![feature(sync_unsafe_cell)]
 #![feature(iter_collect_into)]

turbopack/crates/turbo-tasks/src/lib.rs

@@ -33,7 +33,6 @@
 #![feature(error_generic_member_access)]
 #![feature(arbitrary_self_types)]
 #![feature(arbitrary_self_types_pointers)]
-#![feature(new_zeroed_alloc)]
 #![feature(never_type)]
 #![feature(downcast_unchecked)]
 #![feature(ptr_metadata)]

turbopack/crates/turbopack-core/src/module_graph/mod.rs

@@ -1241,7 +1241,6 @@ macro_rules! get_node_idx {
         }
     }};
 }
-pub(crate) use get_node_idx;
 
 impl ModuleGraph {
     pub async fn read_graphs(self: Vc<ModuleGraph>) -> Result<ModuleGraphRef> {