more dupe word typos

29 files changed, 44 insertions, 46 deletions

diff --git a/compiler/rustc_borrowck/src/universal_regions.rs b/compiler/rustc_borrowck/src/universal_regions.rs
index 51d262a881b..2beb5e0ab5d 100644
--- a/compiler/rustc_borrowck/src/universal_regions.rs
+++ b/compiler/rustc_borrowck/src/universal_regions.rs
@@ -414,7 +414,7 @@ impl<'cx, 'tcx> UniversalRegionsBuilder<'cx, 'tcx> {
 
         let typeck_root_def_id = self.infcx.tcx.typeck_root_def_id(self.mir_def.did.to_def_id());
 
-        // If this is is a 'root' body (not a closure/generator/inline const), then
+        // If this is a 'root' body (not a closure/generator/inline const), then
         // there are no extern regions, so the local regions start at the same
         // position as the (empty) sub-list of extern regions
         let first_local_index = if self.mir_def.did.to_def_id() == typeck_root_def_id {
diff --git a/compiler/rustc_codegen_cranelift/build_system/rustc_info.rs b/compiler/rustc_codegen_cranelift/build_system/rustc_info.rs
index 913b589afcc..3c08b6fa389 100644
--- a/compiler/rustc_codegen_cranelift/build_system/rustc_info.rs
+++ b/compiler/rustc_codegen_cranelift/build_system/rustc_info.rs
@@ -65,7 +65,7 @@ pub(crate) fn get_file_name(crate_name: &str, crate_type: &str) -> String {
 }
 
 /// Similar to `get_file_name`, but converts any dashes (`-`) in the `crate_name` to
-/// underscores (`_`). This is specially made for the the rustc and cargo wrappers
+/// underscores (`_`). This is specially made for the rustc and cargo wrappers
 /// which have a dash in the name, and that is not allowed in a crate name.
 pub(crate) fn get_wrapper_file_name(crate_name: &str, crate_type: &str) -> String {
     let crate_name = crate_name.replace('-', "_");
diff --git a/compiler/rustc_codegen_cranelift/src/abi/pass_mode.rs b/compiler/rustc_codegen_cranelift/src/abi/pass_mode.rs
index 96e25d3a8d4..e5ad31eb948 100644
--- a/compiler/rustc_codegen_cranelift/src/abi/pass_mode.rs
+++ b/compiler/rustc_codegen_cranelift/src/abi/pass_mode.rs
@@ -193,7 +193,7 @@ pub(super) fn from_casted_value<'tcx>(
         kind: StackSlotKind::ExplicitSlot,
         // FIXME Don't force the size to a multiple of 16 bytes once Cranelift gets a way to
         // specify stack slot alignment.
-        // Stack slot size may be bigger for for example `[u8; 3]` which is packed into an `i32`.
+        // Stack slot size may be bigger for example `[u8; 3]` which is packed into an `i32`.
         // It may also be smaller for example when the type is a wrapper around an integer with a
         // larger alignment than the integer.
         size: (std::cmp::max(abi_param_size, layout_size) + 15) / 16 * 16,
diff --git a/compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs b/compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs
index 0d1df6fb1ac..433f043209e 100644
--- a/compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs
+++ b/compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs
@@ -129,7 +129,7 @@ impl CoverageMapGenerator {
             // LLVM Coverage Mapping Format version 6 (zero-based encoded as 5)
             // requires setting the first filename to the compilation directory.
             // Since rustc generates coverage maps with relative paths, the
-            // compilation directory can be combined with the the relative paths
+            // compilation directory can be combined with the relative paths
             // to get absolute paths, if needed.
             let working_dir = tcx
                 .sess
diff --git a/compiler/rustc_const_eval/src/const_eval/error.rs b/compiler/rustc_const_eval/src/const_eval/error.rs
index 136bfbeaad2..4977a5d6bbf 100644
--- a/compiler/rustc_const_eval/src/const_eval/error.rs
+++ b/compiler/rustc_const_eval/src/const_eval/error.rs
@@ -64,7 +64,7 @@ pub struct ConstEvalErr<'tcx> {
 impl<'tcx> ConstEvalErr<'tcx> {
     /// Turn an interpreter error into something to report to the user.
     /// As a side-effect, if RUSTC_CTFE_BACKTRACE is set, this prints the backtrace.
-    /// Should be called only if the error is actually going to to be reported!
+    /// Should be called only if the error is actually going to be reported!
     pub fn new<'mir, M: Machine<'mir, 'tcx>>(
         ecx: &InterpCx<'mir, 'tcx, M>,
         error: InterpErrorInfo<'tcx>,
diff --git a/compiler/rustc_const_eval/src/interpret/memory.rs b/compiler/rustc_const_eval/src/interpret/memory.rs
index ed155fbfef0..e5e015c1e18 100644
--- a/compiler/rustc_const_eval/src/interpret/memory.rs
+++ b/compiler/rustc_const_eval/src/interpret/memory.rs
@@ -794,7 +794,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
             todo.extend(static_roots);
             while let Some(id) = todo.pop() {
                 if reachable.insert(id) {
-                    // This is a new allocation, add the allocation it points to to `todo`.
+                    // This is a new allocation, add the allocation it points to `todo`.
                     if let Some((_, alloc)) = self.memory.alloc_map.get(id) {
                         todo.extend(
                             alloc.provenance().values().filter_map(|prov| prov.get_alloc_id()),
diff --git a/compiler/rustc_data_structures/src/graph/vec_graph/mod.rs b/compiler/rustc_data_structures/src/graph/vec_graph/mod.rs
index 3d91bcade59..e8efbd09a2c 100644
--- a/compiler/rustc_data_structures/src/graph/vec_graph/mod.rs
+++ b/compiler/rustc_data_structures/src/graph/vec_graph/mod.rs
@@ -29,8 +29,8 @@ impl<N: Idx + Ord> VecGraph<N> {
         // Store the *target* of each edge into `edge_targets`.
         let edge_targets: Vec<N> = edge_pairs.iter().map(|&(_, target)| target).collect();
 
-        // Create the *edge starts* array. We are iterating over over
-        // the (sorted) edge pairs. We maintain the invariant that the
+        // Create the *edge starts* array. We are iterating over the
+        // (sorted) edge pairs. We maintain the invariant that the
         // length of the `node_starts` array is enough to store the
         // current source node -- so when we see that the source node
         // for an edge is greater than the current length, we grow the
diff --git a/compiler/rustc_expand/src/expand.rs b/compiler/rustc_expand/src/expand.rs
index c2add852a06..59f434b941e 100644
--- a/compiler/rustc_expand/src/expand.rs
+++ b/compiler/rustc_expand/src/expand.rs
@@ -327,7 +327,7 @@ impl InvocationKind {
     fn placeholder_visibility(&self) -> Option<ast::Visibility> {
         // HACK: For unnamed fields placeholders should have the same visibility as the actual
         // fields because for tuple structs/variants resolve determines visibilities of their
-        // constructor using these field visibilities before attributes on them are are expanded.
+        // constructor using these field visibilities before attributes on them are expanded.
         // The assumption is that the attribute expansion cannot change field visibilities,
         // and it holds because only inert attributes are supported in this position.
         match self {
diff --git a/compiler/rustc_hir_analysis/src/check/fallback.rs b/compiler/rustc_hir_analysis/src/check/fallback.rs
index 4059b3403b1..474d5651bbe 100644
--- a/compiler/rustc_hir_analysis/src/check/fallback.rs
+++ b/compiler/rustc_hir_analysis/src/check/fallback.rs
@@ -72,7 +72,7 @@ impl<'tcx> FnCtxt<'_, 'tcx> {
     //
     // - Unconstrained ints are replaced with `i32`.
     //
-    // - Unconstrained floats are replaced with with `f64`.
+    // - Unconstrained floats are replaced with `f64`.
     //
     // - Non-numerics may get replaced with `()` or `!`, depending on
     //   how they were categorized by `calculate_diverging_fallback`
diff --git a/compiler/rustc_hir_analysis/src/check/generator_interior/drop_ranges/cfg_build.rs b/compiler/rustc_hir_analysis/src/check/generator_interior/drop_ranges/cfg_build.rs
index 016f4056bd9..122ad7009cb 100644
--- a/compiler/rustc_hir_analysis/src/check/generator_interior/drop_ranges/cfg_build.rs
+++ b/compiler/rustc_hir_analysis/src/check/generator_interior/drop_ranges/cfg_build.rs
@@ -210,7 +210,7 @@ impl<'a, 'tcx> DropRangeVisitor<'a, 'tcx> {
     }
 
     /// For an expression with an uninhabited return type (e.g. a function that returns !),
-    /// this adds a self edge to to the CFG to model the fact that the function does not
+    /// this adds a self edge to the CFG to model the fact that the function does not
     /// return.
     fn handle_uninhabited_return(&mut self, expr: &Expr<'tcx>) {
         let ty = self.typeck_results.expr_ty(expr);
diff --git a/compiler/rustc_hir_analysis/src/check/upvar.rs b/compiler/rustc_hir_analysis/src/check/upvar.rs
index 4f495641691..4dea40829f6 100644
--- a/compiler/rustc_hir_analysis/src/check/upvar.rs
+++ b/compiler/rustc_hir_analysis/src/check/upvar.rs
@@ -352,7 +352,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     /// and that the path can be captured with required capture kind (depending on use in closure,
     /// move closure etc.)
     ///
-    /// Returns the set of of adjusted information along with the inferred closure kind and span
+    /// Returns the set of adjusted information along with the inferred closure kind and span
     /// associated with the closure kind inference.
     ///
     /// Note that we *always* infer a minimal kind, even if
diff --git a/compiler/rustc_infer/src/infer/mod.rs b/compiler/rustc_infer/src/infer/mod.rs
index 5a5e9db81a2..167ef279104 100644
--- a/compiler/rustc_infer/src/infer/mod.rs
+++ b/compiler/rustc_infer/src/infer/mod.rs
@@ -1150,8 +1150,8 @@ impl<'tcx> InferCtxt<'tcx> {
     /// Return the universe that the region `r` was created in.  For
     /// most regions (e.g., `'static`, named regions from the user,
     /// etc) this is the root universe U0. For inference variables or
-    /// placeholders, however, it will return the universe which which
-    /// they are associated.
+    /// placeholders, however, it will return the universe which they
+    /// are associated.
     pub fn universe_of_region(&self, r: ty::Region<'tcx>) -> ty::UniverseIndex {
         self.inner.borrow_mut().unwrap_region_constraints().universe(r)
     }
diff --git a/compiler/rustc_lint/src/builtin.rs b/compiler/rustc_lint/src/builtin.rs
index f28cfbd8b4c..886e25f2d78 100644
--- a/compiler/rustc_lint/src/builtin.rs
+++ b/compiler/rustc_lint/src/builtin.rs
@@ -3310,7 +3310,7 @@ declare_lint! {
     /// explicitly.
     ///
     /// To access a library from a binary target within the same crate,
-    /// use `your_crate_name::` as the path path instead of `lib::`:
+    /// use `your_crate_name::` as the path instead of `lib::`:
     ///
     /// ```rust,compile_fail
     /// // bar/src/lib.rs
diff --git a/compiler/rustc_lint_defs/src/builtin.rs b/compiler/rustc_lint_defs/src/builtin.rs
index 4e30aa5eaba..8390d80a458 100644
--- a/compiler/rustc_lint_defs/src/builtin.rs
+++ b/compiler/rustc_lint_defs/src/builtin.rs
@@ -3937,7 +3937,7 @@ declare_lint! {
     ///
     /// The compiler disables the automatic implementation if an explicit one
     /// exists for given type constructor. The exact rules governing this
-    /// are currently unsound and quite subtle and and will be modified in the future.
+    /// are currently unsound, quite subtle, and will be modified in the future.
     /// This change will cause the automatic implementation to be disabled in more
     /// cases, potentially breaking some code.
     pub SUSPICIOUS_AUTO_TRAIT_IMPLS,
diff --git a/compiler/rustc_middle/src/mir/interpret/pointer.rs b/compiler/rustc_middle/src/mir/interpret/pointer.rs
index 95e52e391d8..23c2ce6474c 100644
--- a/compiler/rustc_middle/src/mir/interpret/pointer.rs
+++ b/compiler/rustc_middle/src/mir/interpret/pointer.rs
@@ -43,7 +43,7 @@ pub trait PointerArithmetic: HasDataLayout {
         let val = val as i64;
         // Now wrap-around into the machine_isize range.
         if val > self.machine_isize_max() {
-            // This can only happen the the ptr size is < 64, so we know max_usize_plus_1 fits into
+            // This can only happen if the ptr size is < 64, so we know max_usize_plus_1 fits into
             // i64.
             debug_assert!(self.pointer_size().bits() < 64);
             let max_usize_plus_1 = 1u128 << self.pointer_size().bits();
diff --git a/compiler/rustc_middle/src/ty/fold.rs b/compiler/rustc_middle/src/ty/fold.rs
index e4234442fae..ce4a46e362d 100644
--- a/compiler/rustc_middle/src/ty/fold.rs
+++ b/compiler/rustc_middle/src/ty/fold.rs
@@ -13,8 +13,7 @@
 //!
 //! There are three groups of traits involved in each traversal.
 //! - `TypeFoldable`. This is implemented once for many types, including:
-//!   - Types of interest, for which the the methods delegate to the
-//!     folder.
+//!   - Types of interest, for which the methods delegate to the folder.
 //!   - All other types, including generic containers like `Vec` and `Option`.
 //!     It defines a "skeleton" of how they should be folded.
 //! - `TypeSuperFoldable`. This is implemented only for each type of interest,
diff --git a/compiler/rustc_middle/src/ty/util.rs b/compiler/rustc_middle/src/ty/util.rs
index 713f9067a85..f73d062ba30 100644
--- a/compiler/rustc_middle/src/ty/util.rs
+++ b/compiler/rustc_middle/src/ty/util.rs
@@ -958,7 +958,7 @@ impl<'tcx> Ty<'tcx> {
         }
     }
 
-    /// Checks if `ty` has has a significant drop.
+    /// Checks if `ty` has a significant drop.
     ///
     /// Note that this method can return false even if `ty` has a destructor
     /// attached; even if that is the case then the adt has been marked with
diff --git a/compiler/rustc_middle/src/ty/visit.rs b/compiler/rustc_middle/src/ty/visit.rs
index 44efb93a53b..6e1991b527f 100644
--- a/compiler/rustc_middle/src/ty/visit.rs
+++ b/compiler/rustc_middle/src/ty/visit.rs
@@ -10,8 +10,7 @@
 //!
 //! There are three groups of traits involved in each traversal.
 //! - `TypeVisitable`. This is implemented once for many types, including:
-//!   - Types of interest, for which the the methods delegate to the
-//!     visitor.
+//!   - Types of interest, for which the methods delegate to the visitor.
 //!   - All other types, including generic containers like `Vec` and `Option`.
 //!     It defines a "skeleton" of how they should be visited.
 //! - `TypeSuperVisitable`. This is implemented only for each type of interest,
diff --git a/compiler/rustc_mir_build/src/thir/pattern/usefulness.rs b/compiler/rustc_mir_build/src/thir/pattern/usefulness.rs
index f1279072844..8dc9976eaea 100644
--- a/compiler/rustc_mir_build/src/thir/pattern/usefulness.rs
+++ b/compiler/rustc_mir_build/src/thir/pattern/usefulness.rs
@@ -885,7 +885,7 @@ fn is_useful<'p, 'tcx>(
             // that has the potential to trigger the `non_exhaustive_omitted_patterns` lint.
             // To understand the workings checkout `Constructor::split` and `SplitWildcard::new/into_ctors`
             if is_non_exhaustive_and_wild
-                // We check that the match has a wildcard pattern and that that wildcard is useful,
+                // We check that the match has a wildcard pattern and that wildcard is useful,
                 // meaning there are variants that are covered by the wildcard. Without the check
                 // for `witness_preference` the lint would trigger on `if let NonExhaustiveEnum::A = foo {}`
                 && usefulness.is_useful() && matches!(witness_preference, RealArm)
diff --git a/compiler/rustc_parse/src/parser/diagnostics.rs b/compiler/rustc_parse/src/parser/diagnostics.rs
index f57bd9cec19..828b7d2f2f7 100644
--- a/compiler/rustc_parse/src/parser/diagnostics.rs
+++ b/compiler/rustc_parse/src/parser/diagnostics.rs
@@ -2232,7 +2232,7 @@ impl<'a> Parser<'a> {
     ///
     /// When encountering code like `foo::< bar + 3 >` or `foo::< bar - baz >` we suggest
     /// `foo::<{ bar + 3 }>` and `foo::<{ bar - baz }>`, respectively. We only provide a suggestion
-    /// if we think that that the resulting expression would be well formed.
+    /// if we think that the resulting expression would be well formed.
     pub fn recover_const_arg(
         &mut self,
         start: Span,
diff --git a/compiler/rustc_passes/src/check_attr.rs b/compiler/rustc_passes/src/check_attr.rs
index 73fb89bbc38..dab8ae47779 100644
--- a/compiler/rustc_passes/src/check_attr.rs
+++ b/compiler/rustc_passes/src/check_attr.rs
@@ -268,7 +268,7 @@ impl CheckAttrVisitor<'_> {
             }
             // FIXME(#65833): We permit associated consts to have an `#[inline]` attribute with
             // just a lint, because we previously erroneously allowed it and some crates used it
-            // accidentally, to to be compatible with crates depending on them, we can't throw an
+            // accidentally, to be compatible with crates depending on them, we can't throw an
             // error here.
             Target::AssocConst => {
                 self.tcx.emit_spanned_lint(
@@ -376,7 +376,7 @@ impl CheckAttrVisitor<'_> {
             | Target::Method(MethodKind::Trait { body: true } | MethodKind::Inherent) => true,
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[allow_internal_unstable]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "naked");
@@ -456,7 +456,7 @@ impl CheckAttrVisitor<'_> {
             Target::Fn | Target::Method(..) | Target::ForeignFn | Target::Closure => true,
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[track_caller]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 for attr in attrs {
@@ -485,7 +485,7 @@ impl CheckAttrVisitor<'_> {
             Target::Struct | Target::Enum | Target::Variant => true,
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[non_exhaustive]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "non_exhaustive");
@@ -507,7 +507,7 @@ impl CheckAttrVisitor<'_> {
             Target::Trait => true,
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[marker]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "marker");
@@ -566,7 +566,7 @@ impl CheckAttrVisitor<'_> {
             }
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[target_feature]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "target_feature");
@@ -1205,7 +1205,7 @@ impl CheckAttrVisitor<'_> {
             Target::Fn | Target::Method(..) | Target::ForeignFn | Target::Closure => {}
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[cold]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "cold");
@@ -1247,7 +1247,7 @@ impl CheckAttrVisitor<'_> {
             Target::ForeignFn | Target::ForeignStatic => {}
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[link_name]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "link_name");
@@ -1281,7 +1281,7 @@ impl CheckAttrVisitor<'_> {
             Target::ExternCrate => true,
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[no_link]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "no_link");
@@ -1311,7 +1311,7 @@ impl CheckAttrVisitor<'_> {
             Target::Method(..) if self.is_impl_item(hir_id) => true,
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[export_name]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "export_name");
@@ -1503,7 +1503,7 @@ impl CheckAttrVisitor<'_> {
             Target::Static | Target::Fn | Target::Method(..) => {}
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[link_section]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "link_section");
@@ -1528,7 +1528,7 @@ impl CheckAttrVisitor<'_> {
             Target::Method(..) if self.is_impl_item(hir_id) => {}
             // FIXME(#80564): We permit struct fields, match arms and macro defs to have an
             // `#[no_mangle]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "no_mangle");
@@ -1782,7 +1782,7 @@ impl CheckAttrVisitor<'_> {
             Target::MacroDef => true,
             // FIXME(#80564): We permit struct fields and match arms to have an
             // `#[allow_internal_unstable]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm => {
                 self.inline_attr_str_error_without_macro_def(
@@ -1877,7 +1877,7 @@ impl CheckAttrVisitor<'_> {
             }
             // FIXME(#80564): We permit struct fields and match arms to have an
             // `#[allow_internal_unstable]` attribute with just a lint, because we previously
-            // erroneously allowed it and some crates used it accidentally, to to be compatible
+            // erroneously allowed it and some crates used it accidentally, to be compatible
             // with crates depending on them, we can't throw an error here.
             Target::Field | Target::Arm | Target::MacroDef => {
                 self.inline_attr_str_error_with_macro_def(hir_id, attr, "allow_internal_unstable");
diff --git a/compiler/rustc_resolve/src/lib.rs b/compiler/rustc_resolve/src/lib.rs
index 971cd62831d..1c1976af505 100644
--- a/compiler/rustc_resolve/src/lib.rs
+++ b/compiler/rustc_resolve/src/lib.rs
@@ -2060,7 +2060,7 @@ struct Finalize {
     /// Span of the whole path or some its characteristic fragment.
     /// E.g. span of `b` in `foo::{a, b, c}`, or full span for regular paths.
     path_span: Span,
-    /// Span of the path start, suitable for prepending something to to it.
+    /// Span of the path start, suitable for prepending something to it.
     /// E.g. span of `foo` in `foo::{a, b, c}`, or full span for regular paths.
     root_span: Span,
     /// Whether to report privacy errors or silently return "no resolution" for them,
diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs
index 102df3a4d7e..a8be318dea8 100644
--- a/compiler/rustc_session/src/options.rs
+++ b/compiler/rustc_session/src/options.rs
@@ -186,7 +186,7 @@ top_level_options!(
         /// Remap source path prefixes in all output (messages, object files, debug, etc.).
         remap_path_prefix: Vec<(PathBuf, PathBuf)> [TRACKED_NO_CRATE_HASH],
         /// Base directory containing the `src/` for the Rust standard library, and
-        /// potentially `rustc` as well, if we can can find it. Right now it's always
+        /// potentially `rustc` as well, if we can find it. Right now it's always
         /// `$sysroot/lib/rustlib/src/rust` (i.e. the `rustup` `rust-src` component).
         ///
         /// This directory is what the virtual `/rustc/$hash` is translated back to,
diff --git a/compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs b/compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs
index aa65a72ab64..6aa031c8378 100644
--- a/compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs
+++ b/compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs
@@ -540,7 +540,7 @@ fn encode_ty<'tcx>(
             let mut s = String::new();
             let def_id = adt_def.0.did;
             if options.contains(EncodeTyOptions::GENERALIZE_REPR_C) && adt_def.repr().c() {
-                // For for cross-language CFI support, the encoding must be compatible at the FFI
+                // For cross-language CFI support, the encoding must be compatible at the FFI
                 // boundary. For instance:
                 //
                 //     struct type1 {};
diff --git a/compiler/rustc_target/src/abi/call/mod.rs b/compiler/rustc_target/src/abi/call/mod.rs
index 9fe7da3f29e..9e5f0e4d158 100644
--- a/compiler/rustc_target/src/abi/call/mod.rs
+++ b/compiler/rustc_target/src/abi/call/mod.rs
@@ -47,7 +47,7 @@ pub enum PassMode {
     /// Pass the argument indirectly via a hidden pointer.
     /// The `extra_attrs` value, if any, is for the extra data (vtable or length)
     /// which indicates that it refers to an unsized rvalue.
-    /// `on_stack` defines that the the value should be passed at a fixed
+    /// `on_stack` defines that the value should be passed at a fixed
     /// stack offset in accordance to the ABI rather than passed using a
     /// pointer. This corresponds to the `byval` LLVM argument attribute.
     Indirect { attrs: ArgAttributes, extra_attrs: Option<ArgAttributes>, on_stack: bool },
diff --git a/compiler/rustc_trait_selection/src/traits/coherence.rs b/compiler/rustc_trait_selection/src/traits/coherence.rs
index 7fc5c2ed0ea..77158747431 100644
--- a/compiler/rustc_trait_selection/src/traits/coherence.rs
+++ b/compiler/rustc_trait_selection/src/traits/coherence.rs
@@ -193,7 +193,7 @@ fn overlap_within_probe<'cx, 'tcx>(
         }
     }
 
-    // We disable the leak when when creating the `snapshot` by using
+    // We disable the leak when creating the `snapshot` by using
     // `infcx.probe_maybe_disable_leak_check`.
     if infcx.leak_check(true, snapshot).is_err() {
         debug!("overlap: leak check failed");
diff --git a/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs b/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs
index 8ea3d0fc917..b06f24ddf2e 100644
--- a/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs
+++ b/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs
@@ -101,7 +101,7 @@ impl<'tcx> ConstUnifyCtxt<'tcx> {
                         a_uv == b_uv
                     }
                     // FIXME(generic_const_exprs): We may want to either actually try
-                    // to evaluate `a_ct` and `b_ct` if they are are fully concrete or something like
+                    // to evaluate `a_ct` and `b_ct` if they are fully concrete or something like
                     // this, for now we just return false here.
                     _ => false,
                 }
diff --git a/compiler/rustc_trait_selection/src/traits/project.rs b/compiler/rustc_trait_selection/src/traits/project.rs
index cd1e9a97731..1ca9a1c1994 100644
--- a/compiler/rustc_trait_selection/src/traits/project.rs
+++ b/compiler/rustc_trait_selection/src/traits/project.rs
@@ -566,7 +566,7 @@ impl<'a, 'b, 'tcx> TypeFolder<'tcx> for AssocTypeNormalizer<'a, 'b, 'tcx> {
                     .unwrap_or_else(|| ty.super_fold_with(self).into())
                 };
                 // For cases like #95134 we would like to catch overflows early
-                // otherwise they slip away away and cause ICE.
+                // otherwise they slip away and cause ICE.
                 let recursion_limit = self.tcx().recursion_limit();
                 if !recursion_limit.value_within_limit(self.depth)
                     // HACK: Don't overflow when running cargo doc see #100991
diff --git a/compiler/rustc_ty_utils/src/needs_drop.rs b/compiler/rustc_ty_utils/src/needs_drop.rs
index ba987c6f763..d390a308153 100644
--- a/compiler/rustc_ty_utils/src/needs_drop.rs
+++ b/compiler/rustc_ty_utils/src/needs_drop.rs
@@ -264,7 +264,7 @@ fn adt_consider_insignificant_dtor<'tcx>(
         if is_marked_insig {
             // In some cases like `std::collections::HashMap` where the struct is a wrapper around
             // a type that is a Drop type, and the wrapped type (eg: `hashbrown::HashMap`) lies
-            // outside stdlib, we might choose to still annotate the the wrapper (std HashMap) with
+            // outside stdlib, we might choose to still annotate the wrapper (std HashMap) with
             // `rustc_insignificant_dtor`, even if the type itself doesn't have a `Drop` impl.
             Some(DtorType::Insignificant)
         } else if adt_def.destructor(tcx).is_some() {