Rollup of 4 pull requests

.github/workflows/clippy_bors.yml

@@ -208,8 +208,9 @@ jobs:
     - name: Extract Binaries
       run: |
         DIR=$CARGO_TARGET_DIR/debug
+        rm $DIR/deps/integration-*.d
+        mv $DIR/deps/integration-* $DIR/integration
         find $DIR ! -executable -o -type d ! -path $DIR | xargs rm -rf
-        mv $DIR/integration-* $DIR/integration
         rm -rf $CARGO_TARGET_DIR/release
 
     - name: Upload Binaries

clippy_lints/src/functions.rs

@@ -486,7 +486,7 @@ fn is_mutable_pat(cx: &LateContext<'_, '_>, pat: &hir::Pat<'_>, tys: &mut FxHash
     if let hir::PatKind::Wild = pat.kind {
         return false; // ignore `_` patterns
     }
-    let def_id = pat.hir_id.owner_def_id();
+    let def_id = pat.hir_id.owner.to_def_id();
     if cx.tcx.has_typeck_tables(def_id) {
         is_mutable_ty(cx, &cx.tcx.typeck_tables_of(def_id).pat_ty(pat), pat.span, tys)
     } else {
@@ -601,7 +601,7 @@ impl<'a, 'tcx> intravisit::Visitor<'tcx> for StaticMutVisitor<'a, 'tcx> {
             Call(_, args) | MethodCall(_, _, args) => {
                 let mut tys = FxHashSet::default();
                 for arg in args {
-                    let def_id = arg.hir_id.owner_def_id();
+                    let def_id = arg.hir_id.owner.to_def_id();
                     if self.cx.tcx.has_typeck_tables(def_id)
                         && is_mutable_ty(
                             self.cx,

clippy_lints/src/inherent_impl.rs

@@ -59,7 +59,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MultipleInherentImpl {
             // but filter out implementations that have generic params (type or lifetime)
             // or are derived from a macro
             if !in_macro(item.span) && generics.params.is_empty() {
-                self.impls.insert(item.hir_id.owner_def_id(), item.span);
+                self.impls.insert(item.hir_id.owner.to_def_id(), item.span);
             }
         }
     }
@@ -69,7 +69,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MultipleInherentImpl {
             // Retrieve all inherent implementations from the crate, grouped by type
             for impls in cx
                 .tcx
-                .crate_inherent_impls(item.hir_id.owner_def_id().krate)
+                .crate_inherent_impls(item.hir_id.owner.to_def_id().krate)
                 .inherent_impls
                 .values()
             {

clippy_lints/src/lib.rs

@@ -56,9 +56,9 @@ extern crate rustc_trait_selection;
 #[allow(unused_extern_crates)]
 extern crate rustc_typeck;
 
-use rustc::session::Session;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_lint::LintId;
+use rustc_session::Session;
 
 /// Macro used to declare a Clippy lint.
 ///

clippy_lints/src/loops.rs

@@ -1679,7 +1679,7 @@ fn check_for_mutation(
         span_low: None,
         span_high: None,
     };
-    let def_id = def_id::DefId::local(body.hir_id.owner);
+    let def_id = body.hir_id.owner.to_def_id();
     cx.tcx.infer_ctxt().enter(|infcx| {
         ExprUseVisitor::new(&mut delegate, &infcx, def_id, cx.param_env, cx.tables).walk_expr(body);
     });

clippy_lints/src/missing_doc.rs

@@ -135,7 +135,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MissingDoc {
             hir::ItemKind::Fn(..) => {
                 // ignore main()
                 if it.ident.name == sym!(main) {
-                    let def_id = cx.tcx.hir().local_def_id(it.hir_id);
+                    let def_id = it.hir_id.owner;
                     let def_key = cx.tcx.hir().def_key(def_id);
                     if def_key.parent == Some(hir::def_id::CRATE_DEF_INDEX) {
                         return;

clippy_lints/src/missing_inline.rs

@@ -69,7 +69,7 @@ fn check_missing_inline_attrs(cx: &LateContext<'_, '_>, attrs: &[ast::Attribute]
 }
 
 fn is_executable(cx: &LateContext<'_, '_>) -> bool {
-    use rustc::session::config::CrateType;
+    use rustc_session::config::CrateType;
 
     cx.tcx.sess.crate_types.get().iter().any(|t: &CrateType| match t {
         CrateType::Executable => true,

clippy_lints/src/new_without_default.rs

@@ -149,9 +149,9 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NewWithoutDefault {
                                     if_chain! {
                                         if let Some(ref impling_types) = self.impling_types;
                                         if let Some(self_def) = cx.tcx.type_of(self_did).ty_adt_def();
-                                        if self_def.did.is_local();
+                                        if let Some(self_def_id) = self_def.did.as_local();
                                         then {
-                                            let self_id = cx.tcx.hir().local_def_id_to_hir_id(self_def.did.to_local());
+                                            let self_id = cx.tcx.hir().local_def_id_to_hir_id(self_def_id);
                                             if impling_types.contains(&self_id) {
                                                 return;
                                             }

clippy_lints/src/swap.rs

@@ -99,7 +99,7 @@ fn check_manual_swap(cx: &LateContext<'_, '_>, block: &Block<'_>) {
             then {
                 if let ExprKind::Field(ref lhs1, _) = lhs1.kind {
                     if let ExprKind::Field(ref lhs2, _) = lhs2.kind {
-                        if lhs1.hir_id.owner_def_id() == lhs2.hir_id.owner_def_id() {
+                        if lhs1.hir_id.owner == lhs2.hir_id.owner {
                             return;
                         }
                     }

clippy_lints/src/trivially_copy_pass_by_ref.rs

@@ -3,13 +3,13 @@ use std::cmp;
 use crate::utils::{is_copy, is_self_ty, snippet, span_lint_and_sugg};
 use if_chain::if_chain;
 use matches::matches;
-use rustc::session::config::Config as SessionConfig;
 use rustc::ty;
 use rustc_errors::Applicability;
 use rustc_hir as hir;
 use rustc_hir::intravisit::FnKind;
 use rustc_hir::{Body, FnDecl, HirId, ItemKind, MutTy, Mutability, Node};
 use rustc_lint::{LateContext, LateLintPass};
+use rustc_session::config::Config as SessionConfig;
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::Span;
 use rustc_target::abi::LayoutOf;

clippy_lints/src/utils/attrs.rs

@@ -1,6 +1,6 @@
-use rustc::session::Session;
 use rustc_ast::ast;
 use rustc_errors::Applicability;
+use rustc_session::Session;
 use std::str::FromStr;
 
 /// Deprecation status of attributes known by Clippy.

clippy_lints/src/utils/author.rs

@@ -3,14 +3,14 @@
 
 use crate::utils::{get_attr, higher};
 use rustc::hir::map::Map;
-use rustc::session::Session;
 use rustc_ast::ast::{Attribute, LitFloatType, LitKind};
 use rustc_ast::walk_list;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_hir as hir;
 use rustc_hir::intravisit::{NestedVisitorMap, Visitor};
 use rustc_hir::{BindingAnnotation, Block, Expr, ExprKind, Pat, PatKind, QPath, Stmt, StmtKind, TyKind};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
+use rustc_session::Session;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 
 declare_clippy_lint! {

clippy_lints/src/utils/inspector.rs

@@ -1,11 +1,11 @@
 //! checks for attributes
 
 use crate::utils::get_attr;
-use rustc::session::Session;
 use rustc_ast::ast::Attribute;
 use rustc_hir as hir;
 use rustc_hir::print;
 use rustc_lint::{LateContext, LateLintPass, LintContext};
+use rustc_session::Session;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 
 declare_clippy_lint! {

clippy_lints/src/utils/mod.rs

@@ -297,8 +297,8 @@ pub fn qpath_res(cx: &LateContext<'_, '_>, qpath: &hir::QPath<'_>, id: hir::HirI
     match qpath {
         hir::QPath::Resolved(_, path) => path.res,
         hir::QPath::TypeRelative(..) => {
-            if cx.tcx.has_typeck_tables(id.owner_def_id()) {
-                cx.tcx.typeck_tables_of(id.owner_def_id()).qpath_res(qpath, id)
+            if cx.tcx.has_typeck_tables(id.owner.to_def_id()) {
+                cx.tcx.typeck_tables_of(id.owner.to_def_id()).qpath_res(qpath, id)
             } else {
                 Res::Err
             }

clippy_lints/src/utils/usage.rs

@@ -5,7 +5,7 @@ use rustc_ast::ast;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir::def::Res;
 use rustc_hir::intravisit::{walk_expr, NestedVisitorMap, Visitor};
-use rustc_hir::{def_id, Expr, HirId, Path};
+use rustc_hir::{Expr, HirId, Path};
 use rustc_infer::infer::TyCtxtInferExt;
 use rustc_lint::LateContext;
 use rustc_span::symbol::Ident;
@@ -17,7 +17,7 @@ pub fn mutated_variables<'a, 'tcx>(expr: &'tcx Expr<'_>, cx: &'a LateContext<'a,
         used_mutably: FxHashSet::default(),
         skip: false,
     };
-    let def_id = def_id::DefId::local(expr.hir_id.owner);
+    let def_id = expr.hir_id.owner.to_def_id();
     cx.tcx.infer_ctxt().enter(|infcx| {
         ExprUseVisitor::new(&mut delegate, &infcx, def_id, cx.param_env, cx.tables).walk_expr(expr);
     });

clippy_lints/src/wildcard_imports.rs

@@ -85,7 +85,7 @@ impl LateLintPass<'_, '_> for WildcardImports {
             if let ItemKind::Use(use_path, UseKind::Glob) = &item.kind;
             // don't lint prelude glob imports
             if !use_path.segments.iter().last().map_or(false, |ps| ps.ident.as_str() == "prelude");
-            let used_imports = cx.tcx.names_imported_by_glob_use(item.hir_id.owner_def_id());
+            let used_imports = cx.tcx.names_imported_by_glob_use(item.hir_id.owner.to_def_id());
             if !used_imports.is_empty(); // Already handled by `unused_imports`
             then {
                 let mut applicability = Applicability::MachineApplicable;

clippy_lints/src/write.rs

@@ -357,7 +357,7 @@ impl Write {
         };
         let tts = tts.clone();
 
-        let mut parser = parser::Parser::new(&cx.sess.parse_sess, tts, None, false, false, None);
+        let mut parser = parser::Parser::new(&cx.sess.parse_sess, tts, false, None);
         let mut expr: Option<Expr> = None;
         if is_write {
             expr = match parser.parse_expr().map_err(|mut err| err.cancel()) {

tests/ui/inefficient_to_string.stderr

@@ -35,21 +35,21 @@ LL |     let _: String = rrrstring.to_string();
    |
    = help: `&&std::string::String` implements `ToString` through a slower blanket impl, but `std::string::String` has a fast specialization of `ToString`
 
-error: calling `to_string` on `&&std::borrow::Cow<'_, str>`
+error: calling `to_string` on `&&std::borrow::Cow<str>`
   --> $DIR/inefficient_to_string.rs:29:21
    |
 LL |     let _: String = rrcow.to_string();
    |                     ^^^^^^^^^^^^^^^^^ help: try dereferencing the receiver: `(*rrcow).to_string()`
    |
-   = help: `&std::borrow::Cow<'_, str>` implements `ToString` through a slower blanket impl, but `std::borrow::Cow<'_, str>` has a fast specialization of `ToString`
+   = help: `&std::borrow::Cow<str>` implements `ToString` through a slower blanket impl, but `std::borrow::Cow<str>` has a fast specialization of `ToString`
 
-error: calling `to_string` on `&&&std::borrow::Cow<'_, str>`
+error: calling `to_string` on `&&&std::borrow::Cow<str>`
   --> $DIR/inefficient_to_string.rs:30:21
    |
 LL |     let _: String = rrrcow.to_string();
    |                     ^^^^^^^^^^^^^^^^^^ help: try dereferencing the receiver: `(**rrrcow).to_string()`
    |
-   = help: `&&std::borrow::Cow<'_, str>` implements `ToString` through a slower blanket impl, but `std::borrow::Cow<'_, str>` has a fast specialization of `ToString`
+   = help: `&&std::borrow::Cow<str>` implements `ToString` through a slower blanket impl, but `std::borrow::Cow<str>` has a fast specialization of `ToString`
 
 error: aborting due to 6 previous errors
 

tests/ui/transmute.stderr

@@ -1,4 +1,4 @@
-error: transmute from a type (`&'a T`) to itself
+error: transmute from a type (`&T`) to itself
   --> $DIR/transmute.rs:19:20
    |
 LL |     let _: &'a T = core::intrinsics::transmute(t);

tests/ui/transmute_ptr_to_ptr.stderr

@@ -1,3 +1,17 @@
+error: transmute from a type (`&T`) to itself
+  --> $DIR/transmute_ptr_to_ptr.rs:8:5
+   |
+LL |     std::mem::transmute::<&'a T, &'static T>(t)
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `-D clippy::useless-transmute` implied by `-D warnings`
+
+error: transmute from a type (`&T`) to itself
+  --> $DIR/transmute_ptr_to_ptr.rs:13:5
+   |
+LL |     std::mem::transmute::<&'a T, &'b T>(t)
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
 error: transmute from a pointer to a pointer
   --> $DIR/transmute_ptr_to_ptr.rs:29:29
    |
@@ -36,5 +50,17 @@ error: transmute from a reference to a reference
 LL |         let _: &GenericParam<f32> = std::mem::transmute(&GenericParam { t: 1u32 });
    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(&GenericParam { t: 1u32 } as *const GenericParam<u32> as *const GenericParam<f32>)`
 
-error: aborting due to 6 previous errors
+error: transmute from a type (`&LifetimeParam`) to itself
+  --> $DIR/transmute_ptr_to_ptr.rs:50:47
+   |
+LL |     let _: &LifetimeParam<'static> = unsafe { std::mem::transmute(&lp) };
+   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: transmute from a type (`&GenericParam<&LifetimeParam>`) to itself
+  --> $DIR/transmute_ptr_to_ptr.rs:51:62
+   |
+LL |     let _: &GenericParam<&LifetimeParam<'static>> = unsafe { std::mem::transmute(&GenericParam { t: &lp }) };
+   |                                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 10 previous errors
 

tests/ui/transmute_ptr_to_ref.stderr

@@ -42,13 +42,13 @@ error: transmute from a pointer type (`*mut U`) to a reference type (`&T`)
 LL |     let _: &T = std::mem::transmute(om);
    |                 ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(om as *const T)`
 
-error: transmute from a pointer type (`*const i32`) to a reference type (`&issue1231::Foo<'_, u8>`)
+error: transmute from a pointer type (`*const i32`) to a reference type (`&issue1231::Foo<u8>`)
   --> $DIR/transmute_ptr_to_ref.rs:32:32
    |
 LL |     let _: &Foo<u8> = unsafe { std::mem::transmute::<_, &Foo<_>>(raw) };
    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(raw as *const Foo<_>)`
 
-error: transmute from a pointer type (`*const i32`) to a reference type (`&issue1231::Foo<'_, &u8>`)
+error: transmute from a pointer type (`*const i32`) to a reference type (`&issue1231::Foo<&u8>`)
   --> $DIR/transmute_ptr_to_ref.rs:34:33
    |
 LL |     let _: &Foo<&u8> = unsafe { std::mem::transmute::<_, &Foo<&_>>(raw) };