Auto merge of #8856 - xFrednet:rustup, r=Manishearth,Alexendoo

Rustup

`@rust-lang/clippy,` `@Jarcho,` `@dswij,` `@Alexendoo.` Could someone review this? It should be pretty straight forward since it's just a sync. I think it's also fine if either one of `@Jarcho,` `@dswij,` `@Alexendoo` approves this, as these are usually not reviewed. I just want to make sure that I didn't break something obvious 🙃

It should be enough to look at the merge commit 🙃

changelog: none
changelog: move [`significant_drop_in_scrutinee`] to `suspicious`

Author: bors

CHANGELOG.md

@@ -3715,6 +3715,7 @@ Released 2018-09-13
 [`short_circuit_statement`]: https://rust-lang.github.io/rust-clippy/master/index.html#short_circuit_statement
 [`should_assert_eq`]: https://rust-lang.github.io/rust-clippy/master/index.html#should_assert_eq
 [`should_implement_trait`]: https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
+[`significant_drop_in_scrutinee`]: https://rust-lang.github.io/rust-clippy/master/index.html#significant_drop_in_scrutinee
 [`similar_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#similar_names
 [`single_char_add_str`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_add_str
 [`single_char_lifetime_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#single_char_lifetime_names

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "clippy"
-version = "0.1.62"
+version = "0.1.63"
 description = "A bunch of helpful lints to avoid common pitfalls in Rust"
 repository = "https://github.com/rust-lang/rust-clippy"
 readme = "README.md"

clippy_lints/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "clippy_lints"
-version = "0.1.62"
+version = "0.1.63"
 description = "A bunch of helpful lints to avoid common pitfalls in Rust"
 repository = "https://github.com/rust-lang/rust-clippy"
 readme = "README.md"

clippy_lints/src/collapsible_match.rs

@@ -5,7 +5,7 @@ use clippy_utils::{is_lang_ctor, is_unit_expr, path_to_local, peel_blocks_with_s
 use if_chain::if_chain;
 use rustc_errors::MultiSpan;
 use rustc_hir::LangItem::OptionNone;
-use rustc_hir::{Arm, Expr, Guard, HirId, Pat, PatKind};
+use rustc_hir::{Arm, Expr, Guard, HirId, Let, Pat, PatKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::Span;
@@ -109,7 +109,10 @@ fn check_arm<'tcx>(
             (Some(a), Some(b)) => SpanlessEq::new(cx).eq_expr(a, b),
         };
         // the binding must not be used in the if guard
-        if outer_guard.map_or(true, |(Guard::If(e) | Guard::IfLet(_, e))| !is_local_used(cx, *e, binding_id));
+        if outer_guard.map_or(
+            true,
+            |(Guard::If(e) | Guard::IfLet(Let { init: e, .. }))| !is_local_used(cx, *e, binding_id)
+        );
         // ...or anywhere in the inner expression
         if match inner {
             IfLetOrMatch::IfLet(_, _, body, els) => {

clippy_lints/src/derivable_impls.rs

@@ -1,5 +1,5 @@
 use clippy_utils::diagnostics::span_lint_and_help;
-use clippy_utils::{is_automatically_derived, is_default_equivalent, peel_blocks};
+use clippy_utils::{is_default_equivalent, peel_blocks};
 use rustc_hir::{
     def::{DefKind, Res},
     Body, Expr, ExprKind, GenericArg, Impl, ImplItemKind, Item, ItemKind, Node, PathSegment, QPath, TyKind,
@@ -71,8 +71,7 @@ impl<'tcx> LateLintPass<'tcx> for DerivableImpls {
                 self_ty,
                 ..
             }) = item.kind;
-            if let attrs = cx.tcx.hir().attrs(item.hir_id());
-            if !is_automatically_derived(attrs);
+            if !cx.tcx.has_attr(item.def_id.to_def_id(), sym::automatically_derived);
             if !item.span.from_expansion();
             if let Some(def_id) = trait_ref.trait_def_id();
             if cx.tcx.is_diagnostic_item(sym::Default, def_id);
@@ -81,6 +80,7 @@ impl<'tcx> LateLintPass<'tcx> for DerivableImpls {
             if let ImplItemKind::Fn(_, b) = &impl_item.kind;
             if let Body { value: func_expr, .. } = cx.tcx.hir().body(*b);
             if let Some(adt_def) = cx.tcx.type_of(item.def_id).ty_adt_def();
+            if let attrs = cx.tcx.hir().attrs(item.hir_id());
             if !attrs.iter().any(|attr| attr.doc_str().is_some());
             if let child_attrs = cx.tcx.hir().attrs(impl_item_hir);
             if !child_attrs.iter().any(|attr| attr.doc_str().is_some());

clippy_lints/src/derive.rs

@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::{span_lint_and_help, span_lint_and_note, span_lint_and_sugg, span_lint_and_then};
 use clippy_utils::paths;
 use clippy_utils::ty::{implements_trait, is_copy};
-use clippy_utils::{is_automatically_derived, is_lint_allowed, match_def_path};
+use clippy_utils::{is_lint_allowed, match_def_path};
 use if_chain::if_chain;
 use rustc_errors::Applicability;
 use rustc_hir::intravisit::{walk_expr, walk_fn, walk_item, FnKind, Visitor};
@@ -205,8 +205,7 @@ impl<'tcx> LateLintPass<'tcx> for Derive {
         }) = item.kind
         {
             let ty = cx.tcx.type_of(item.def_id);
-            let attrs = cx.tcx.hir().attrs(item.hir_id());
-            let is_automatically_derived = is_automatically_derived(attrs);
+            let is_automatically_derived = cx.tcx.has_attr(item.def_id.to_def_id(), sym::automatically_derived);
 
             check_hash_peq(cx, item.span, trait_ref, ty, is_automatically_derived);
             check_ord_partial_ord(cx, item.span, trait_ref, ty, is_automatically_derived);
@@ -236,7 +235,7 @@ fn check_hash_peq<'tcx>(
         then {
             // Look for the PartialEq implementations for `ty`
             cx.tcx.for_each_relevant_impl(peq_trait_def_id, ty, |impl_id| {
-                let peq_is_automatically_derived = is_automatically_derived(cx.tcx.get_attrs(impl_id));
+                let peq_is_automatically_derived = cx.tcx.has_attr(impl_id, sym::automatically_derived);
 
                 if peq_is_automatically_derived == hash_is_automatically_derived {
                     return;
@@ -290,7 +289,7 @@ fn check_ord_partial_ord<'tcx>(
         then {
             // Look for the PartialOrd implementations for `ty`
             cx.tcx.for_each_relevant_impl(partial_ord_trait_def_id, ty, |impl_id| {
-                let partial_ord_is_automatically_derived = is_automatically_derived(cx.tcx.get_attrs(impl_id));
+                let partial_ord_is_automatically_derived = cx.tcx.has_attr(impl_id, sym::automatically_derived);
 
                 if partial_ord_is_automatically_derived == ord_is_automatically_derived {
                     return;

clippy_lints/src/entry.rs

@@ -11,7 +11,7 @@ use rustc_errors::Applicability;
 use rustc_hir::{
     hir_id::HirIdSet,
     intravisit::{walk_expr, Visitor},
-    Block, Expr, ExprKind, Guard, HirId, Pat, Stmt, StmtKind, UnOp,
+    Block, Expr, ExprKind, Guard, HirId, Let, Pat, Stmt, StmtKind, UnOp,
 };
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
@@ -478,7 +478,7 @@ impl<'tcx> Visitor<'tcx> for InsertSearcher<'_, 'tcx> {
                     let mut is_map_used = self.is_map_used;
                     for arm in arms {
                         self.visit_pat(arm.pat);
-                        if let Some(Guard::If(guard) | Guard::IfLet(_, guard)) = arm.guard {
+                        if let Some(Guard::If(guard) | Guard::IfLet(&Let { init: guard, .. })) = arm.guard {
                             self.visit_non_tail_expr(guard);
                         }
                         is_map_used |= self.visit_cond_arm(arm.body);

clippy_lints/src/eta_reduction.rs

@@ -150,7 +150,7 @@ impl<'tcx> LateLintPass<'tcx> for EtaReduction {
             if check_inputs(cx, body.params, args);
             let method_def_id = cx.typeck_results().type_dependent_def_id(body.value.hir_id).unwrap();
             let substs = cx.typeck_results().node_substs(body.value.hir_id);
-            let call_ty = cx.tcx.type_of(method_def_id).subst(cx.tcx, substs);
+            let call_ty = cx.tcx.bound_type_of(method_def_id).subst(cx.tcx, substs);
             if check_sig(cx, closure_ty, call_ty);
             then {
                 span_lint_and_then(cx, REDUNDANT_CLOSURE_FOR_METHOD_CALLS, expr.span, "redundant closure", |diag| {

clippy_lints/src/functions/must_use.rs

@@ -13,13 +13,13 @@ use clippy_utils::attrs::is_proc_macro;
 use clippy_utils::diagnostics::{span_lint_and_help, span_lint_and_then};
 use clippy_utils::source::snippet_opt;
 use clippy_utils::ty::is_must_use_ty;
-use clippy_utils::{match_def_path, must_use_attr, return_ty, trait_ref_of_method};
+use clippy_utils::{match_def_path, return_ty, trait_ref_of_method};
 
 use super::{DOUBLE_MUST_USE, MUST_USE_CANDIDATE, MUST_USE_UNIT};
 
 pub(super) fn check_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) {
     let attrs = cx.tcx.hir().attrs(item.hir_id());
-    let attr = must_use_attr(attrs);
+    let attr = cx.tcx.get_attr(item.def_id.to_def_id(), sym::must_use);
     if let hir::ItemKind::Fn(ref sig, _generics, ref body_id) = item.kind {
         let is_public = cx.access_levels.is_exported(item.def_id);
         let fn_header_span = item.span.with_hi(sig.decl.output.span().hi());
@@ -44,7 +44,7 @@ pub(super) fn check_impl_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Imp
         let is_public = cx.access_levels.is_exported(item.def_id);
         let fn_header_span = item.span.with_hi(sig.decl.output.span().hi());
         let attrs = cx.tcx.hir().attrs(item.hir_id());
-        let attr = must_use_attr(attrs);
+        let attr = cx.tcx.get_attr(item.def_id.to_def_id(), sym::must_use);
         if let Some(attr) = attr {
             check_needless_must_use(cx, sig.decl, item.hir_id(), item.span, fn_header_span, attr);
         } else if is_public && !is_proc_macro(cx.sess(), attrs) && trait_ref_of_method(cx, item.def_id).is_none() {
@@ -67,7 +67,7 @@ pub(super) fn check_trait_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Tr
         let fn_header_span = item.span.with_hi(sig.decl.output.span().hi());
 
         let attrs = cx.tcx.hir().attrs(item.hir_id());
-        let attr = must_use_attr(attrs);
+        let attr = cx.tcx.get_attr(item.def_id.to_def_id(), sym::must_use);
         if let Some(attr) = attr {
             check_needless_must_use(cx, sig.decl, item.hir_id(), item.span, fn_header_span, attr);
         } else if let hir::TraitFn::Provided(eid) = *eid {

clippy_lints/src/future_not_send.rs

@@ -5,7 +5,7 @@ use rustc_hir::{Body, FnDecl, HirId};
 use rustc_infer::infer::TyCtxtInferExt;
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty::subst::Subst;
-use rustc_middle::ty::{Opaque, PredicateKind::Trait};
+use rustc_middle::ty::{EarlyBinder, Opaque, PredicateKind::Trait};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::{sym, Span};
 use rustc_trait_selection::traits::error_reporting::suggestions::InferCtxtExt;
@@ -67,7 +67,7 @@ impl<'tcx> LateLintPass<'tcx> for FutureNotSend {
             let preds = cx.tcx.explicit_item_bounds(id);
             let mut is_future = false;
             for &(p, _span) in preds {
-                let p = p.subst(cx.tcx, subst);
+                let p = EarlyBinder(p).subst(cx.tcx, subst);
                 if let Some(trait_pred) = p.to_opt_poly_trait_pred() {
                     if Some(trait_pred.skip_binder().trait_ref.def_id) == cx.tcx.lang_items().future_trait() {
                         is_future = true;