Auto merge of rust-lang#120239 - matthiaskrgr:rollup-vqjn6ot, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#118578 (core: introduce split_at{,_mut}_checked)
 - rust-lang#119369 (exclude unexported macro bindings from extern crate)
 - rust-lang#119408 (xous: misc fixes + add network support)
 - rust-lang#119943 (std::net: bind update for using backlog as `-1` too.)
 - rust-lang#119948 (Make `unsafe_op_in_unsafe_fn` migrated in edition 2024)
 - rust-lang#119999 (remote-test: use u64 to represent file size)
 - rust-lang#120152 (add help message for `exclusive_range_pattern` error)
 - rust-lang#120213 (Don't actually make bound ty/const for RTN)
 - rust-lang#120225 (Fix -Zremap-path-scope typo)

Failed merges:

 - rust-lang#119972 (Add `ErrCode`)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

compiler/rustc_resolve/src/imports.rs

@@ -80,7 +80,11 @@ pub(crate) enum ImportKind<'a> {
         target: Ident,
         id: NodeId,
     },
-    MacroUse,
+    MacroUse {
+        /// A field has been added indicating whether it should be reported as a lint,
+        /// addressing issue#119301.
+        warn_private: bool,
+    },
     MacroExport,
 }
 
@@ -127,7 +131,7 @@ impl<'a> std::fmt::Debug for ImportKind<'a> {
                 .field("target", target)
                 .field("id", id)
                 .finish(),
-            MacroUse => f.debug_struct("MacroUse").finish(),
+            MacroUse { .. } => f.debug_struct("MacroUse").finish(),
             MacroExport => f.debug_struct("MacroExport").finish(),
         }
     }
@@ -197,7 +201,7 @@ impl<'a> ImportData<'a> {
             ImportKind::Single { id, .. }
             | ImportKind::Glob { id, .. }
             | ImportKind::ExternCrate { id, .. } => Some(id),
-            ImportKind::MacroUse | ImportKind::MacroExport => None,
+            ImportKind::MacroUse { .. } | ImportKind::MacroExport => None,
         }
     }
 
@@ -207,7 +211,7 @@ impl<'a> ImportData<'a> {
             ImportKind::Single { id, .. } => Reexport::Single(to_def_id(id)),
             ImportKind::Glob { id, .. } => Reexport::Glob(to_def_id(id)),
             ImportKind::ExternCrate { id, .. } => Reexport::ExternCrate(to_def_id(id)),
-            ImportKind::MacroUse => Reexport::MacroUse,
+            ImportKind::MacroUse { .. } => Reexport::MacroUse,
             ImportKind::MacroExport => Reexport::MacroExport,
         }
     }
@@ -1482,7 +1486,7 @@ fn import_kind_to_string(import_kind: &ImportKind<'_>) -> String {
         ImportKind::Single { source, .. } => source.to_string(),
         ImportKind::Glob { .. } => "*".to_string(),
         ImportKind::ExternCrate { .. } => "<extern crate>".to_string(),
-        ImportKind::MacroUse => "#[macro_use]".to_string(),
+        ImportKind::MacroUse { .. } => "#[macro_use]".to_string(),
         ImportKind::MacroExport => "#[macro_export]".to_string(),
     }
 }

compiler/rustc_resolve/src/lib.rs

@@ -55,6 +55,7 @@ use rustc_middle::span_bug;
 use rustc_middle::ty::{self, MainDefinition, RegisteredTools, TyCtxt};
 use rustc_middle::ty::{ResolverGlobalCtxt, ResolverOutputs};
 use rustc_query_system::ich::StableHashingContext;
+use rustc_session::lint::builtin::PRIVATE_MACRO_USE;
 use rustc_session::lint::LintBuffer;
 use rustc_span::hygiene::{ExpnId, LocalExpnId, MacroKind, SyntaxContext, Transparency};
 use rustc_span::symbol::{kw, sym, Ident, Symbol};
@@ -1799,6 +1800,10 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
             }
         }
         if let NameBindingKind::Import { import, binding, ref used } = used_binding.kind {
+            if let ImportKind::MacroUse { warn_private: true } = import.kind {
+                let msg = format!("macro `{ident}` is private");
+                self.lint_buffer().buffer_lint(PRIVATE_MACRO_USE, import.root_id, ident.span, msg);
+            }
             // Avoid marking `extern crate` items that refer to a name from extern prelude,
             // but not introduce it, as used if they are accessed from lexical scope.
             if is_lexical_scope {

library/core/src/lib.rs

@@ -185,6 +185,7 @@
 #![feature(set_ptr_value)]
 #![feature(slice_ptr_get)]
 #![feature(slice_split_at_unchecked)]
+#![feature(split_at_checked)]
 #![feature(str_internals)]
 #![feature(str_split_inclusive_remainder)]
 #![feature(str_split_remainder)]