Rollup of 15 pull requests

compiler/rustc_ast_lowering/src/lib.rs

@@ -507,7 +507,9 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                         let count = generics
                             .params
                             .iter()
-                            .filter(|param| matches!(param.kind, ast::GenericParamKind::Lifetime { .. }))
+                            .filter(|param| {
+                                matches!(param.kind, ast::GenericParamKind::Lifetime { .. })
+                            })
                             .count();
                         self.lctx.type_def_lifetime_params.insert(def_id.to_def_id(), count);
                     }

compiler/rustc_attr/src/builtin.rs

@@ -586,12 +586,14 @@ pub fn eval_condition(
                     return false;
                 }
             };
-            let channel = env!("CFG_RELEASE_CHANNEL");
-            let nightly = channel == "nightly" || channel == "dev";
             let rustc_version = parse_version(env!("CFG_RELEASE"), true).unwrap();
 
-            // See https://github.com/rust-lang/rust/issues/64796#issuecomment-625474439 for details
-            if nightly { rustc_version > min_version } else { rustc_version >= min_version }
+            // See https://github.com/rust-lang/rust/issues/64796#issuecomment-640851454 for details
+            if sess.assume_incomplete_release {
+                rustc_version > min_version
+            } else {
+                rustc_version >= min_version
+            }
         }
         ast::MetaItemKind::List(ref mis) => {
             for mi in mis.iter() {

compiler/rustc_builtin_macros/src/deriving/generic/mod.rs

@@ -598,7 +598,7 @@ impl<'a> TraitDef<'a> {
 
             let mut ty_params = params
                 .iter()
-                .filter(|param| matches!(param.kind,  ast::GenericParamKind::Type{..}))
+                .filter(|param| matches!(param.kind, ast::GenericParamKind::Type { .. }))
                 .peekable();
 
             if ty_params.peek().is_some() {

compiler/rustc_errors/src/diagnostic_builder.rs

@@ -36,7 +36,7 @@ macro_rules! forward_inner_docs {
     ($e:expr => $i:item) => {
         #[doc = $e]
         $i
-    }
+    };
 }
 
 /// In general, the `DiagnosticBuilder` uses deref to allow access to

compiler/rustc_errors/src/snippet.rs

@@ -122,11 +122,13 @@ impl Annotation {
     }
 
     pub fn is_multiline(&self) -> bool {
-        matches!(self.annotation_type,
+        matches!(
+            self.annotation_type,
             AnnotationType::Multiline(_)
-            | AnnotationType::MultilineStart(_)
-            | AnnotationType::MultilineLine(_)
-            | AnnotationType::MultilineEnd(_))
+                | AnnotationType::MultilineStart(_)
+                | AnnotationType::MultilineLine(_)
+                | AnnotationType::MultilineEnd(_)
+        )
     }
 
     pub fn len(&self) -> usize {
@@ -158,7 +160,10 @@ impl Annotation {
 
     pub fn takes_space(&self) -> bool {
         // Multiline annotations always have to keep vertical space.
-        matches!(self.annotation_type, AnnotationType::MultilineStart(_) | AnnotationType::MultilineEnd(_))
+        matches!(
+            self.annotation_type,
+            AnnotationType::MultilineStart(_) | AnnotationType::MultilineEnd(_)
+        )
     }
 }
 

compiler/rustc_hir/src/hir.rs

@@ -1543,10 +1543,10 @@ pub fn is_range_literal(expr: &Expr<'_>) -> bool {
             **qpath,
             QPath::LangItem(
                 LangItem::Range
-                | LangItem::RangeTo
-                | LangItem::RangeFrom
-                | LangItem::RangeFull
-                | LangItem::RangeToInclusive,
+                    | LangItem::RangeTo
+                    | LangItem::RangeFrom
+                    | LangItem::RangeFull
+                    | LangItem::RangeToInclusive,
                 _,
             )
         ),

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/trait_impl_difference.rs

@@ -132,7 +132,12 @@ impl Visitor<'tcx> for TypeParamSpanVisitor<'tcx> {
                 [segment]
                     if segment
                         .res
-                        .map(|res| matches!(res, Res::SelfTy(_, _) | Res::Def(hir::def::DefKind::TyParam, _)))
+                        .map(|res| {
+                            matches!(
+                                res,
+                                Res::SelfTy(_, _) | Res::Def(hir::def::DefKind::TyParam, _)
+                            )
+                        })
                         .unwrap_or(false) =>
                 {
                     self.types.push(path.span);

compiler/rustc_interface/src/tests.rs

@@ -540,6 +540,7 @@ fn test_debugging_options_tracking_hash() {
     // This list is in alphabetical order.
     tracked!(allow_features, Some(vec![String::from("lang_items")]));
     tracked!(always_encode_mir, true);
+    tracked!(assume_incomplete_release, true);
     tracked!(asm_comments, true);
     tracked!(binary_dep_depinfo, true);
     tracked!(chalk, true);

compiler/rustc_middle/src/hir/map/mod.rs

@@ -559,9 +559,9 @@ impl<'hir> Map<'hir> {
             self.find(self.get_parent_node(id)),
             Some(
                 Node::Item(_)
-                | Node::TraitItem(_)
-                | Node::ImplItem(_)
-                | Node::Expr(Expr { kind: ExprKind::Closure(..), .. }),
+                    | Node::TraitItem(_)
+                    | Node::ImplItem(_)
+                    | Node::Expr(Expr { kind: ExprKind::Closure(..), .. }),
             )
         )
     }

compiler/rustc_middle/src/mir/interpret/mod.rs

@@ -588,12 +588,3 @@ pub fn read_target_uint(endianness: Endian, mut source: &[u8]) -> Result<u128, i
     debug_assert!(source.len() == 0); // We should have consumed the source buffer.
     uint
 }
-
-/// Computes the unsigned absolute value without wrapping or panicking.
-#[inline]
-pub fn uabs(value: i64) -> u64 {
-    // The only tricky part here is if value == i64::MIN. In that case,
-    // wrapping_abs() returns i64::MIN == -2^63. Casting this value to a u64
-    // gives 2^63, the correct value.
-    value.wrapping_abs() as u64
-}

compiler/rustc_middle/src/mir/interpret/pointer.rs

@@ -1,4 +1,4 @@
-use super::{uabs, AllocId, InterpResult};
+use super::{AllocId, InterpResult};
 
 use rustc_macros::HashStable;
 use rustc_target::abi::{HasDataLayout, Size};
@@ -57,7 +57,7 @@ pub trait PointerArithmetic: HasDataLayout {
     #[inline]
     fn overflowing_signed_offset(&self, val: u64, i: i64) -> (u64, bool) {
         // We need to make sure that i fits in a machine isize.
-        let n = uabs(i);
+        let n = i.unsigned_abs();
         if i >= 0 {
             let (val, over) = self.overflowing_offset(val, n);
             (val, over || i > self.machine_isize_max())

compiler/rustc_middle/src/mir/mod.rs

@@ -962,8 +962,7 @@ impl<'tcx> LocalDecl<'tcx> {
                     opt_ty_info: _,
                     opt_match_place: _,
                     pat_span: _,
-                })
-                | BindingForm::ImplicitSelf(ImplicitSelfKind::Imm),
+                }) | BindingForm::ImplicitSelf(ImplicitSelfKind::Imm),
             )))
         )
     }
@@ -980,8 +979,7 @@ impl<'tcx> LocalDecl<'tcx> {
                     opt_ty_info: _,
                     opt_match_place: _,
                     pat_span: _,
-                })
-                | BindingForm::ImplicitSelf(_),
+                }) | BindingForm::ImplicitSelf(_),
             )))
         )
     }

compiler/rustc_middle/src/ty/diagnostics.rs

@@ -12,13 +12,17 @@ impl<'tcx> TyS<'tcx> {
     pub fn is_primitive_ty(&self) -> bool {
         matches!(
             self.kind(),
-            Bool | Char | Str | Int(_) | Uint(_) | Float(_)
-            | Infer(
-                InferTy::IntVar(_)
-                | InferTy::FloatVar(_)
-                | InferTy::FreshIntTy(_)
-                | InferTy::FreshFloatTy(_)
-            )
+            Bool | Char
+                | Str
+                | Int(_)
+                | Uint(_)
+                | Float(_)
+                | Infer(
+                    InferTy::IntVar(_)
+                        | InferTy::FloatVar(_)
+                        | InferTy::FreshIntTy(_)
+                        | InferTy::FreshFloatTy(_)
+                )
         )
     }
 

compiler/rustc_middle/src/ty/error.rs

@@ -646,11 +646,14 @@ impl<T> Trait<T> for X {
         let current_method_ident = body_owner.and_then(|n| n.ident()).map(|i| i.name);
 
         // We don't want to suggest calling an assoc fn in a scope where that isn't feasible.
-        let callable_scope = matches!(body_owner, Some(
+        let callable_scope = matches!(
+            body_owner,
+            Some(
                 hir::Node::Item(hir::Item { kind: hir::ItemKind::Fn(..), .. })
-                | hir::Node::TraitItem(hir::TraitItem { kind: hir::TraitItemKind::Fn(..), .. })
-                | hir::Node::ImplItem(hir::ImplItem { kind: hir::ImplItemKind::Fn(..), .. }),
-            ));
+                    | hir::Node::TraitItem(hir::TraitItem { kind: hir::TraitItemKind::Fn(..), .. })
+                    | hir::Node::ImplItem(hir::ImplItem { kind: hir::ImplItemKind::Fn(..), .. }),
+            )
+        );
         let impl_comparison = matches!(
             cause_code,
             ObligationCauseCode::CompareImplMethodObligation { .. }

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -2143,6 +2143,7 @@ fn for_each_def(tcx: TyCtxt<'_>, mut collect_fn: impl for<'b> FnMut(&'b Ident, N
 
             match child.res {
                 def::Res::Def(DefKind::AssocTy, _) => {}
+                def::Res::Def(DefKind::TyAlias, _) => {}
                 def::Res::Def(defkind, def_id) => {
                     if let Some(ns) = defkind.ns() {
                         collect_fn(&child.ident, ns, def_id);

compiler/rustc_middle/src/ty/sty.rs

@@ -1871,8 +1871,14 @@ impl<'tcx> TyS<'tcx> {
     pub fn is_scalar(&self) -> bool {
         matches!(
             self.kind(),
-            Bool | Char | Int(_) | Float(_) | Uint(_) | FnDef(..) | FnPtr(_) | RawPtr(_)
-            | Infer(IntVar(_) | FloatVar(_))
+            Bool | Char
+                | Int(_)
+                | Float(_)
+                | Uint(_)
+                | FnDef(..)
+                | FnPtr(_)
+                | RawPtr(_)
+                | Infer(IntVar(_) | FloatVar(_))
         )
     }
 

compiler/rustc_mir/src/interpret/intrinsics.rs

@@ -7,7 +7,7 @@ use std::convert::TryFrom;
 use rustc_hir::def_id::DefId;
 use rustc_middle::mir::{
     self,
-    interpret::{uabs, ConstValue, GlobalId, InterpResult, Scalar},
+    interpret::{ConstValue, GlobalId, InterpResult, Scalar},
     BinOp,
 };
 use rustc_middle::ty;
@@ -542,7 +542,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         // memory between these pointers must be accessible. Note that we do not require the
         // pointers to be properly aligned (unlike a read/write operation).
         let min_ptr = if offset_bytes >= 0 { ptr } else { offset_ptr };
-        let size: u64 = uabs(offset_bytes);
+        let size = offset_bytes.unsigned_abs();
         // This call handles checking for integer/NULL pointers.
         self.memory.check_ptr_access_align(
             min_ptr,