Merge from rustc

Author: oli-obk

CHANGELOG.md

@@ -152,6 +152,8 @@ Current stable, released 2023-03-09
 
 * `SYSROOT` and `--sysroot` can now be set at the same time
   [#10149](https://github.com/rust-lang/rust-clippy/pull/10149)
+* Fix error when providing an `array-size-threshold` in `clippy.toml`
+  [#10423](https://github.com/rust-lang/rust-clippy/pull/10423)
 
 ## Rust 1.67
 
@@ -186,8 +188,6 @@ Released 2023-01-26
 
 ### Moves and Deprecations
 
-* Moved [`uninlined_format_args`] to `style` (Now warn-by-default)
-  [#9865](https://github.com/rust-lang/rust-clippy/pull/9865)
 * Moved [`needless_collect`] to `nursery` (Now allow-by-default)
   [#9705](https://github.com/rust-lang/rust-clippy/pull/9705)
 * Moved [`or_fun_call`] to `nursery` (Now allow-by-default)
@@ -423,7 +423,7 @@ Released 2022-12-15
   [#9490](https://github.com/rust-lang/rust-clippy/pull/9490)
 * [`almost_complete_letter_range`]: No longer lints in external macros
   [#9467](https://github.com/rust-lang/rust-clippy/pull/9467)
-* [`drop_copy`]: No longer lints on idiomatic cases in match arms 
+* [`drop_copy`]: No longer lints on idiomatic cases in match arms
   [#9491](https://github.com/rust-lang/rust-clippy/pull/9491)
 * [`question_mark`]: No longer lints in const context
   [#9487](https://github.com/rust-lang/rust-clippy/pull/9487)
@@ -4382,6 +4382,7 @@ Released 2018-09-13
 <!-- begin autogenerated links to lint list -->
 [`absurd_extreme_comparisons`]: https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
 [`alloc_instead_of_core`]: https://rust-lang.github.io/rust-clippy/master/index.html#alloc_instead_of_core
+[`allow_attributes`]: https://rust-lang.github.io/rust-clippy/master/index.html#allow_attributes
 [`allow_attributes_without_reason`]: https://rust-lang.github.io/rust-clippy/master/index.html#allow_attributes_without_reason
 [`almost_complete_letter_range`]: https://rust-lang.github.io/rust-clippy/master/index.html#almost_complete_letter_range
 [`almost_complete_range`]: https://rust-lang.github.io/rust-clippy/master/index.html#almost_complete_range
@@ -4661,6 +4662,7 @@ Released 2018-09-13
 [`manual_instant_elapsed`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_instant_elapsed
 [`manual_is_ascii_check`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_ascii_check
 [`manual_let_else`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_let_else
+[`manual_main_separator_str`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_main_separator_str
 [`manual_map`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
 [`manual_memcpy`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
 [`manual_non_exhaustive`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_non_exhaustive
@@ -4985,6 +4987,7 @@ Released 2018-09-13
 [`unnecessary_safety_doc`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_safety_doc
 [`unnecessary_self_imports`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_self_imports
 [`unnecessary_sort_by`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_sort_by
+[`unnecessary_struct_initialization`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_struct_initialization
 [`unnecessary_to_owned`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_to_owned
 [`unnecessary_unwrap`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
 [`unnecessary_wraps`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_wraps

CONTRIBUTING.md

@@ -50,7 +50,7 @@ a [developer guide] and is a good place to start your journey.
 All issues on Clippy are mentored, if you want help simply ask someone from the
 Clippy team directly by mentioning them in the issue or over on [Zulip]. All
 currently active team members can be found
-[here](https://github.com/rust-lang/highfive/blob/master/highfive/configs/rust-lang/rust-clippy.json#L3)
+[here](https://github.com/rust-lang/rust-clippy/blob/master/triagebot.toml#L18)
 
 Some issues are easier than others. The [`good-first-issue`] label can be used to find the easy
 issues. You can use `@rustbot claim` to assign the issue to yourself.

book/src/lint_configuration.md

@@ -519,6 +519,7 @@ for the generic parameters for determining interior mutability
 **Default Value:** `["bytes::Bytes"]` (`Vec<String>`)
 
 * [mutable_key_type](https://rust-lang.github.io/rust-clippy/master/index.html#mutable_key_type)
+* [ifs_same_cond](https://rust-lang.github.io/rust-clippy/master/index.html#ifs_same_cond)
 
 
 ### allow-mixed-uninlined-format-args

clippy_dev/src/lib.rs

@@ -1,5 +1,4 @@
 #![feature(let_chains)]
-#![feature(once_cell)]
 #![feature(rustc_private)]
 #![cfg_attr(feature = "deny-warnings", deny(warnings))]
 // warn on lints, that are included in `rust-lang/rust`s bootstrap

clippy_lints/src/allow_attributes.rs

@@ -0,0 +1,71 @@
+use ast::AttrStyle;
+use clippy_utils::diagnostics::span_lint_and_sugg;
+use rustc_ast as ast;
+use rustc_errors::Applicability;
+use rustc_lint::{LateContext, LateLintPass};
+use rustc_session::{declare_lint_pass, declare_tool_lint};
+
+declare_clippy_lint! {
+    /// Detects uses of the `#[allow]` attribute and suggests replacing it with
+    /// the `#[expect]` (See [RFC 2383](https://rust-lang.github.io/rfcs/2383-lint-reasons.html))
+    ///
+    /// The expect attribute is still unstable and requires the `lint_reasons`
+    /// on nightly. It can be enabled by adding `#![feature(lint_reasons)]` to
+    /// the crate root.
+    ///
+    /// This lint only warns outer attributes (`#[allow]`), as inner attributes
+    /// (`#![allow]`) are usually used to enable or disable lints on a global scale.
+    ///
+    /// ### Why is this bad?
+    ///
+    /// `#[expect]` attributes suppress the lint emission, but emit a warning, if
+    /// the expectation is unfulfilled. This can be useful to be notified when the
+    /// lint is no longer triggered.
+    ///
+    /// ### Example
+    /// ```rust,ignore
+    /// #[allow(unused_mut)]
+    /// fn foo() -> usize {
+    ///    let mut a = Vec::new();
+    ///    a.len()
+    /// }
+    /// ```
+    /// Use instead:
+    /// ```rust,ignore
+    /// #![feature(lint_reasons)]
+    /// #[expect(unused_mut)]
+    /// fn foo() -> usize {
+    ///     let mut a = Vec::new();
+    ///     a.len()
+    /// }
+    /// ```
+    #[clippy::version = "1.69.0"]
+    pub ALLOW_ATTRIBUTES,
+    restriction,
+    "`#[allow]` will not trigger if a warning isn't found. `#[expect]` triggers if there are no warnings."
+}
+
+declare_lint_pass!(AllowAttribute => [ALLOW_ATTRIBUTES]);
+
+impl LateLintPass<'_> for AllowAttribute {
+    // Separate each crate's features.
+    fn check_attribute(&mut self, cx: &LateContext<'_>, attr: &ast::Attribute) {
+        if_chain! {
+            if cx.tcx.features().lint_reasons;
+            if let AttrStyle::Outer = attr.style;
+            if let Some(ident) = attr.ident();
+            if ident.name == rustc_span::symbol::sym::allow;
+            then {
+                span_lint_and_sugg(
+                    cx,
+                    ALLOW_ATTRIBUTES,
+                    ident.span,
+                    "#[allow] attribute found",
+                    "replace it with",
+                    "expect".into(),
+                    Applicability::MachineApplicable,
+                );
+            }
+        }
+    }
+}

clippy_lints/src/booleans.rs

@@ -495,18 +495,19 @@ struct NotSimplificationVisitor<'a, 'tcx> {
 
 impl<'a, 'tcx> Visitor<'tcx> for NotSimplificationVisitor<'a, 'tcx> {
     fn visit_expr(&mut self, expr: &'tcx Expr<'_>) {
-        if let ExprKind::Unary(UnOp::Not, inner) = &expr.kind {
-            if let Some(suggestion) = simplify_not(self.cx, inner) {
-                span_lint_and_sugg(
-                    self.cx,
-                    NONMINIMAL_BOOL,
-                    expr.span,
-                    "this boolean expression can be simplified",
-                    "try",
-                    suggestion,
-                    Applicability::MachineApplicable,
-                );
-            }
+        if let ExprKind::Unary(UnOp::Not, inner) = &expr.kind &&
+            !inner.span.from_expansion() &&
+            let Some(suggestion) = simplify_not(self.cx, inner)
+        {
+            span_lint_and_sugg(
+                self.cx,
+                NONMINIMAL_BOOL,
+                expr.span,
+                "this boolean expression can be simplified",
+                "try",
+                suggestion,
+                Applicability::MachineApplicable,
+            );
         }
 
         walk_expr(self, expr);

clippy_lints/src/copies.rs

@@ -1,18 +1,20 @@
 use clippy_utils::diagnostics::{span_lint_and_note, span_lint_and_then};
 use clippy_utils::source::{first_line_of_span, indent_of, reindent_multiline, snippet, snippet_opt};
-use clippy_utils::ty::needs_ordered_drop;
+use clippy_utils::ty::{is_interior_mut_ty, needs_ordered_drop};
 use clippy_utils::visitors::for_each_expr;
 use clippy_utils::{
-    capture_local_usage, eq_expr_value, get_enclosing_block, hash_expr, hash_stmt, if_sequence, is_else_clause,
-    is_lint_allowed, path_to_local, search_same, ContainsName, HirEqInterExpr, SpanlessEq,
+    capture_local_usage, def_path_def_ids, eq_expr_value, find_binding_init, get_enclosing_block, hash_expr, hash_stmt,
+    if_sequence, is_else_clause, is_lint_allowed, path_to_local, search_same, ContainsName, HirEqInterExpr, SpanlessEq,
 };
 use core::iter;
 use core::ops::ControlFlow;
 use rustc_errors::Applicability;
+use rustc_hir::def_id::DefIdSet;
 use rustc_hir::intravisit;
 use rustc_hir::{BinOpKind, Block, Expr, ExprKind, HirId, HirIdSet, Stmt, StmtKind};
 use rustc_lint::{LateContext, LateLintPass};
-use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_middle::query::Key;
+use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::hygiene::walk_chain;
 use rustc_span::source_map::SourceMap;
 use rustc_span::{BytePos, Span, Symbol};
@@ -159,18 +161,40 @@ declare_clippy_lint! {
     "`if` statement with shared code in all blocks"
 }
 
-declare_lint_pass!(CopyAndPaste => [
+pub struct CopyAndPaste {
+    ignore_interior_mutability: Vec<String>,
+    ignored_ty_ids: DefIdSet,
+}
+
+impl CopyAndPaste {
+    pub fn new(ignore_interior_mutability: Vec<String>) -> Self {
+        Self {
+            ignore_interior_mutability,
+            ignored_ty_ids: DefIdSet::new(),
+        }
+    }
+}
+
+impl_lint_pass!(CopyAndPaste => [
     IFS_SAME_COND,
     SAME_FUNCTIONS_IN_IF_CONDITION,
     IF_SAME_THEN_ELSE,
     BRANCHES_SHARING_CODE
 ]);
 
 impl<'tcx> LateLintPass<'tcx> for CopyAndPaste {
+    fn check_crate(&mut self, cx: &LateContext<'tcx>) {
+        for ignored_ty in &self.ignore_interior_mutability {
+            let path: Vec<&str> = ignored_ty.split("::").collect();
+            for id in def_path_def_ids(cx, path.as_slice()) {
+                self.ignored_ty_ids.insert(id);
+            }
+        }
+    }
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
         if !expr.span.from_expansion() && matches!(expr.kind, ExprKind::If(..)) && !is_else_clause(cx.tcx, expr) {
             let (conds, blocks) = if_sequence(expr);
-            lint_same_cond(cx, &conds);
+            lint_same_cond(cx, &conds, &self.ignored_ty_ids);
             lint_same_fns_in_if_cond(cx, &conds);
             let all_same =
                 !is_lint_allowed(cx, IF_SAME_THEN_ELSE, expr.hir_id) && lint_if_same_then_else(cx, &conds, &blocks);
@@ -547,9 +571,39 @@ fn check_for_warn_of_moved_symbol(cx: &LateContext<'_>, symbols: &[(HirId, Symbo
     })
 }
 
+fn method_caller_is_mutable(cx: &LateContext<'_>, caller_expr: &Expr<'_>, ignored_ty_ids: &DefIdSet) -> bool {
+    let caller_ty = cx.typeck_results().expr_ty(caller_expr);
+    // Check if given type has inner mutability and was not set to ignored by the configuration
+    let is_inner_mut_ty = is_interior_mut_ty(cx, caller_ty)
+        && !matches!(caller_ty.ty_adt_id(), Some(adt_id) if ignored_ty_ids.contains(&adt_id));
+
+    is_inner_mut_ty
+        || caller_ty.is_mutable_ptr()
+        // `find_binding_init` will return the binding iff its not mutable
+        || path_to_local(caller_expr)
+            .and_then(|hid| find_binding_init(cx, hid))
+            .is_none()
+}
+
 /// Implementation of `IFS_SAME_COND`.
-fn lint_same_cond(cx: &LateContext<'_>, conds: &[&Expr<'_>]) {
-    for (i, j) in search_same(conds, |e| hash_expr(cx, e), |lhs, rhs| eq_expr_value(cx, lhs, rhs)) {
+fn lint_same_cond(cx: &LateContext<'_>, conds: &[&Expr<'_>], ignored_ty_ids: &DefIdSet) {
+    for (i, j) in search_same(
+        conds,
+        |e| hash_expr(cx, e),
+        |lhs, rhs| {
+            // Ignore eq_expr side effects iff one of the expressin kind is a method call
+            // and the caller is not a mutable, including inner mutable type.
+            if let ExprKind::MethodCall(_, caller, _, _) = lhs.kind {
+                if method_caller_is_mutable(cx, caller, ignored_ty_ids) {
+                    false
+                } else {
+                    SpanlessEq::new(cx).eq_expr(lhs, rhs)
+                }
+            } else {
+                eq_expr_value(cx, lhs, rhs)
+            }
+        },
+    ) {
         span_lint_and_note(
             cx,
             IFS_SAME_COND,

clippy_lints/src/declared_lints.rs

@@ -35,6 +35,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
     crate::utils::internal_lints::produce_ice::PRODUCE_ICE_INFO,
     #[cfg(feature = "internal")]
     crate::utils::internal_lints::unnecessary_def_path::UNNECESSARY_DEF_PATH_INFO,
+    crate::allow_attributes::ALLOW_ATTRIBUTES_INFO,
     crate::almost_complete_range::ALMOST_COMPLETE_RANGE_INFO,
     crate::approx_const::APPROX_CONSTANT_INFO,
     crate::as_conversions::AS_CONVERSIONS_INFO,
@@ -262,6 +263,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
     crate::manual_clamp::MANUAL_CLAMP_INFO,
     crate::manual_is_ascii_check::MANUAL_IS_ASCII_CHECK_INFO,
     crate::manual_let_else::MANUAL_LET_ELSE_INFO,
+    crate::manual_main_separator_str::MANUAL_MAIN_SEPARATOR_STR_INFO,
     crate::manual_non_exhaustive::MANUAL_NON_EXHAUSTIVE_INFO,
     crate::manual_rem_euclid::MANUAL_REM_EUCLID_INFO,
     crate::manual_retain::MANUAL_RETAIN_INFO,
@@ -616,6 +618,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
     crate::unnamed_address::VTABLE_ADDRESS_COMPARISONS_INFO,
     crate::unnecessary_owned_empty_strings::UNNECESSARY_OWNED_EMPTY_STRINGS_INFO,
     crate::unnecessary_self_imports::UNNECESSARY_SELF_IMPORTS_INFO,
+    crate::unnecessary_struct_initialization::UNNECESSARY_STRUCT_INITIALIZATION_INFO,
     crate::unnecessary_wraps::UNNECESSARY_WRAPS_INFO,
     crate::unnested_or_patterns::UNNESTED_OR_PATTERNS_INFO,
     crate::unsafe_removed_from_name::UNSAFE_REMOVED_FROM_NAME_INFO,

clippy_lints/src/default.rs

@@ -1,5 +1,5 @@
 use clippy_utils::diagnostics::{span_lint_and_note, span_lint_and_sugg};
-use clippy_utils::source::snippet_with_macro_callsite;
+use clippy_utils::source::snippet_with_context;
 use clippy_utils::ty::{has_drop, is_copy};
 use clippy_utils::{
     any_parent_is_automatically_derived, contains_name, get_parent_expr, is_from_proc_macro, match_def_path, paths,
@@ -160,6 +160,8 @@ impl<'tcx> LateLintPass<'tcx> for Default {
                 }
             };
 
+            let init_ctxt = local.span.ctxt();
+
             // find all "later statement"'s where the fields of the binding set as
             // Default::default() get reassigned, unless the reassignment refers to the original binding
             let mut first_assign = None;
@@ -169,7 +171,7 @@ impl<'tcx> LateLintPass<'tcx> for Default {
                 // find out if and which field was set by this `consecutive_statement`
                 if let Some((field_ident, assign_rhs)) = field_reassigned_by_stmt(consecutive_statement, binding_name) {
                     // interrupt and cancel lint if assign_rhs references the original binding
-                    if contains_name(binding_name, assign_rhs, cx) {
+                    if contains_name(binding_name, assign_rhs, cx) || init_ctxt != consecutive_statement.span.ctxt() {
                         cancel_lint = true;
                         break;
                     }
@@ -204,11 +206,12 @@ impl<'tcx> LateLintPass<'tcx> for Default {
                     .iter()
                     .all(|field| assigned_fields.iter().any(|(a, _)| a == &field.name));
 
+                let mut app = Applicability::Unspecified;
                 let field_list = assigned_fields
                     .into_iter()
                     .map(|(field, rhs)| {
                         // extract and store the assigned value for help message
-                        let value_snippet = snippet_with_macro_callsite(cx, rhs.span, "..");
+                        let value_snippet = snippet_with_context(cx, rhs.span, init_ctxt, "..", &mut app).0;
                         format!("{field}: {value_snippet}")
                     })
                     .collect::<Vec<String>>()

clippy_lints/src/derive.rs

@@ -24,8 +24,8 @@ use rustc_span::sym;
 
 declare_clippy_lint! {
     /// ### What it does
-    /// Checks for deriving `Hash` but implementing `PartialEq`
-    /// explicitly or vice versa.
+    /// Lints against manual `PartialEq` implementations for types with a derived `Hash`
+    /// implementation.
     ///
     /// ### Why is this bad?
     /// The implementation of these traits must agree (for
@@ -54,8 +54,8 @@ declare_clippy_lint! {
 
 declare_clippy_lint! {
     /// ### What it does
-    /// Checks for deriving `Ord` but implementing `PartialOrd`
-    /// explicitly or vice versa.
+    /// Lints against manual `PartialOrd` and `Ord` implementations for types with a derived `Ord`
+    /// or `PartialOrd` implementation.
     ///
     /// ### Why is this bad?
     /// The implementation of these traits must agree (for