Deny rustc::internal lints for rustdoc and clippy

src/bootstrap/check.rs

@@ -320,6 +320,13 @@ macro_rules! tool_check_step {
                     cargo.arg("--all-targets");
                 }
 
+                // Enable internal lints for clippy and rustdoc
+                // NOTE: this intentionally doesn't enable lints for any other tools,
+                // see https://github.com/rust-lang/rust/pull/80573#issuecomment-754010776
+                if $path == "src/tools/rustdoc" || $path == "src/tools/clippy" {
+                    cargo.rustflag("-Zunstable-options");
+                }
+
                 builder.info(&format!(
                     "Checking stage{} {} artifacts ({} -> {})",
                     builder.top_stage,

src/librustdoc/config.rs

@@ -1,4 +1,4 @@
-use std::collections::{BTreeMap, HashMap};
+use std::collections::BTreeMap;
 use std::convert::TryFrom;
 use std::ffi::OsStr;
 use std::fmt;
@@ -219,7 +219,7 @@ crate struct RenderOptions {
     crate extern_html_root_urls: BTreeMap<String, String>,
     /// A map of the default settings (values are as for DOM storage API). Keys should lack the
     /// `rustdoc-` prefix.
-    crate default_settings: HashMap<String, String>,
+    crate default_settings: FxHashMap<String, String>,
     /// If present, suffix added to CSS/JavaScript files when referencing them in generated pages.
     crate resource_suffix: String,
     /// Whether to run the static CSS/JavaScript through a minifier when outputting them. `true` by

src/librustdoc/doctest.rs

@@ -1,4 +1,5 @@
 use rustc_ast as ast;
+use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::sync::Lrc;
 use rustc_errors::{ColorConfig, ErrorReported};
 use rustc_hir as hir;
@@ -16,7 +17,6 @@ use rustc_span::{BytePos, FileName, Pos, Span, DUMMY_SP};
 use rustc_target::spec::TargetTriple;
 use tempfile::Builder as TempFileBuilder;
 
-use std::collections::HashMap;
 use std::env;
 use std::io::{self, Write};
 use std::panic;
@@ -703,7 +703,7 @@ crate struct Collector {
     position: Span,
     source_map: Option<Lrc<SourceMap>>,
     filename: Option<PathBuf>,
-    visited_tests: HashMap<(String, usize), usize>,
+    visited_tests: FxHashMap<(String, usize), usize>,
 }
 
 impl Collector {
@@ -727,7 +727,7 @@ impl Collector {
             position: DUMMY_SP,
             source_map,
             filename,
-            visited_tests: HashMap::new(),
+            visited_tests: FxHashMap::default(),
         }
     }
 
@@ -1009,7 +1009,7 @@ impl<'a, 'hir, 'tcx> HirCollector<'a, 'hir, 'tcx> {
                 self.codes,
                 self.collector.enable_per_target_ignores,
                 Some(&crate::html::markdown::ExtraInfo::new(
-                    &self.tcx,
+                    self.tcx,
                     hir_id,
                     span_of_attrs(&attrs).unwrap_or(sp),
                 )),

src/librustdoc/formats/renderer.rs

@@ -1,6 +1,6 @@
 use std::sync::Arc;
 
-use rustc_middle::ty;
+use rustc_middle::ty::TyCtxt;
 use rustc_span::edition::Edition;
 
 use crate::clean;
@@ -20,7 +20,7 @@ crate trait FormatRenderer<'tcx>: Clone {
         render_info: RenderInfo,
         edition: Edition,
         cache: &mut Cache,
-        tcx: ty::TyCtxt<'tcx>,
+        tcx: TyCtxt<'tcx>,
     ) -> Result<(Self, clean::Crate), Error>;
 
     /// Renders a single non-module item. This means no recursive sub-item rendering is required.
@@ -55,7 +55,7 @@ crate fn run_format<'tcx, T: FormatRenderer<'tcx>>(
     render_info: RenderInfo,
     diag: &rustc_errors::Handler,
     edition: Edition,
-    tcx: ty::TyCtxt<'tcx>,
+    tcx: TyCtxt<'tcx>,
 ) -> Result<(), Error> {
     let (krate, mut cache) = Cache::from_krate(
         render_info.clone(),

src/librustdoc/html/layout.rs

@@ -1,6 +1,7 @@
-use std::collections::HashMap;
 use std::path::PathBuf;
 
+use rustc_data_structures::fx::FxHashMap;
+
 use crate::externalfiles::ExternalHtml;
 use crate::html::escape::Escape;
 use crate::html::format::{Buffer, Print};
@@ -11,7 +12,7 @@ crate struct Layout {
     crate logo: String,
     crate favicon: String,
     crate external_html: ExternalHtml,
-    crate default_settings: HashMap<String, String>,
+    crate default_settings: FxHashMap<String, String>,
     crate krate: String,
     /// The given user css file which allow to customize the generated
     /// documentation theme.

src/librustdoc/html/markdown.rs

@@ -620,7 +620,7 @@ crate fn find_testable_code<T: doctest::Tester>(
     tests: &mut T,
     error_codes: ErrorCodes,
     enable_per_target_ignores: bool,
-    extra_info: Option<&ExtraInfo<'_, '_>>,
+    extra_info: Option<&ExtraInfo<'_>>,
 ) {
     let mut parser = Parser::new(doc).into_offset_iter();
     let mut prev_offset = 0;
@@ -681,19 +681,19 @@ crate fn find_testable_code<T: doctest::Tester>(
     }
 }
 
-crate struct ExtraInfo<'a, 'b> {
+crate struct ExtraInfo<'tcx> {
     hir_id: Option<HirId>,
     item_did: Option<DefId>,
     sp: Span,
-    tcx: &'a TyCtxt<'b>,
+    tcx: TyCtxt<'tcx>,
 }
 
-impl<'a, 'b> ExtraInfo<'a, 'b> {
-    crate fn new(tcx: &'a TyCtxt<'b>, hir_id: HirId, sp: Span) -> ExtraInfo<'a, 'b> {
+impl<'tcx> ExtraInfo<'tcx> {
+    crate fn new(tcx: TyCtxt<'tcx>, hir_id: HirId, sp: Span) -> ExtraInfo<'tcx> {
         ExtraInfo { hir_id: Some(hir_id), item_did: None, sp, tcx }
     }
 
-    crate fn new_did(tcx: &'a TyCtxt<'b>, did: DefId, sp: Span) -> ExtraInfo<'a, 'b> {
+    crate fn new_did(tcx: TyCtxt<'tcx>, did: DefId, sp: Span) -> ExtraInfo<'tcx> {
         ExtraInfo { hir_id: None, item_did: Some(did), sp, tcx }
     }
 
@@ -775,7 +775,7 @@ impl LangString {
         string: &str,
         allow_error_code_check: ErrorCodes,
         enable_per_target_ignores: bool,
-        extra: Option<&ExtraInfo<'_, '_>>,
+        extra: Option<&ExtraInfo<'_>>,
     ) -> LangString {
         let allow_error_code_check = allow_error_code_check.as_bool();
         let mut seen_rust_tags = false;
@@ -1208,7 +1208,7 @@ crate struct RustCodeBlock {
 
 /// Returns a range of bytes for each code block in the markdown that is tagged as `rust` or
 /// untagged (and assumed to be rust).
-crate fn rust_code_blocks(md: &str, extra_info: &ExtraInfo<'_, '_>) -> Vec<RustCodeBlock> {
+crate fn rust_code_blocks(md: &str, extra_info: &ExtraInfo<'_>) -> Vec<RustCodeBlock> {
     let mut code_blocks = vec![];
 
     if md.is_empty() {

src/librustdoc/html/render/mod.rs

@@ -55,7 +55,6 @@ use rustc_hir as hir;
 use rustc_hir::def_id::{DefId, LOCAL_CRATE};
 use rustc_hir::Mutability;
 use rustc_middle::middle::stability;
-use rustc_middle::ty;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
 use rustc_span::edition::Edition;
@@ -390,7 +389,7 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
         _render_info: RenderInfo,
         edition: Edition,
         cache: &mut Cache,
-        tcx: ty::TyCtxt<'tcx>,
+        tcx: TyCtxt<'tcx>,
     ) -> Result<(Self, clean::Crate), Error> {
         // need to save a copy of the options for rendering the index page
         let md_opts = options.clone();

src/librustdoc/json/mod.rs

@@ -13,7 +13,7 @@ use std::path::PathBuf;
 use std::rc::Rc;
 
 use rustc_data_structures::fx::FxHashMap;
-use rustc_middle::ty;
+use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
 use rustc_span::edition::Edition;
 
@@ -26,7 +26,7 @@ use crate::html::render::cache::ExternalLocation;
 
 #[derive(Clone)]
 crate struct JsonRenderer<'tcx> {
-    tcx: ty::TyCtxt<'tcx>,
+    tcx: TyCtxt<'tcx>,
     /// A mapping of IDs that contains all local items for this crate which gets output as a top
     /// level field of the JSON blob.
     index: Rc<RefCell<FxHashMap<types::Id, types::Item>>>,
@@ -131,7 +131,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
         _render_info: RenderInfo,
         _edition: Edition,
         _cache: &mut Cache,
-        tcx: ty::TyCtxt<'tcx>,
+        tcx: TyCtxt<'tcx>,
     ) -> Result<(Self, clean::Crate), Error> {
         debug!("Initializing json renderer");
         Ok((

src/librustdoc/lib.rs

@@ -18,6 +18,7 @@
 #![feature(str_split_once)]
 #![feature(iter_intersperse)]
 #![recursion_limit = "256"]
+#![deny(rustc::internal)]
 
 #[macro_use]
 extern crate lazy_static;
@@ -65,7 +66,7 @@ use std::process;
 use rustc_driver::abort_on_err;
 use rustc_errors::ErrorReported;
 use rustc_interface::interface;
-use rustc_middle::ty;
+use rustc_middle::ty::TyCtxt;
 use rustc_session::config::{make_crate_type_option, ErrorOutputType, RustcOptGroup};
 use rustc_session::getopts;
 use rustc_session::{early_error, early_warn};
@@ -471,7 +472,7 @@ fn run_renderer<'tcx, T: formats::FormatRenderer<'tcx>>(
     render_info: config::RenderInfo,
     diag: &rustc_errors::Handler,
     edition: rustc_span::edition::Edition,
-    tcx: ty::TyCtxt<'tcx>,
+    tcx: TyCtxt<'tcx>,
 ) -> MainResult {
     match formats::run_format::<T>(krate, renderopts, render_info, &diag, edition, tcx) {
         Ok(_) => Ok(()),

src/librustdoc/passes/check_code_block_syntax.rs

@@ -108,7 +108,7 @@ impl<'a, 'tcx> DocFolder for SyntaxChecker<'a, 'tcx> {
     fn fold_item(&mut self, item: clean::Item) -> Option<clean::Item> {
         if let Some(dox) = &item.attrs.collapsed_doc_value() {
             let sp = span_of_attrs(&item.attrs).unwrap_or(item.source.span());
-            let extra = crate::html::markdown::ExtraInfo::new_did(&self.cx.tcx, item.def_id, sp);
+            let extra = crate::html::markdown::ExtraInfo::new_did(self.cx.tcx, item.def_id, sp);
             for code_block in markdown::rust_code_blocks(&dox, &extra) {
                 self.check_rust_syntax(&item, &dox, code_block);
             }

src/librustdoc/passes/collect_intra_doc_links.rs

@@ -13,6 +13,7 @@ use rustc_hir::def::{
     PerNS,
 };
 use rustc_hir::def_id::{CrateNum, DefId};
+use rustc_middle::ty::TyCtxt;
 use rustc_middle::{bug, ty};
 use rustc_resolve::ParentScope;
 use rustc_session::lint::{
@@ -85,7 +86,7 @@ impl Res {
         }
     }
 
-    fn name(self, tcx: ty::TyCtxt<'_>) -> String {
+    fn name(self, tcx: TyCtxt<'_>) -> String {
         match self {
             Res::Def(_, id) => tcx.item_name(id).to_string(),
             Res::Primitive(prim) => prim.as_str().to_string(),
@@ -865,12 +866,11 @@ impl<'a, 'tcx> DocFolder for LinkCollector<'a, 'tcx> {
 
         // FIXME(jynelson): this shouldn't go through stringification, rustdoc should just use the DefId directly
         let self_name = self_id.and_then(|self_id| {
-            use ty::TyKind;
             if matches!(self.cx.tcx.def_kind(self_id), DefKind::Impl) {
                 // using `ty.to_string()` (or any variant) has issues with raw idents
                 let ty = self.cx.tcx.type_of(self_id);
                 let name = match ty.kind() {
-                    TyKind::Adt(def, _) => Some(self.cx.tcx.item_name(def.did).to_string()),
+                    ty::Adt(def, _) => Some(self.cx.tcx.item_name(def.did).to_string()),
                     other if other.is_primitive() => Some(ty.to_string()),
                     _ => None,
                 };