diff --git a/crates/ide_assists/src/handlers/replace_qualified_name_with_use.rs b/crates/ide_assists/src/handlers/replace_qualified_name_with_use.rs
index 6b196681ca..2c540dc80d 100644
--- a/crates/ide_assists/src/handlers/replace_qualified_name_with_use.rs
+++ b/crates/ide_assists/src/handlers/replace_qualified_name_with_use.rs
@@ -102,10 +102,10 @@ fn shorten_paths(node: &SyntaxNode, path: &ast::Path) {
             match child {
                 // Don't modify `use` items, as this can break the `use` item when injecting a new
                 // import into the use tree.
-                ast::Use(_it) => continue,
+                ast::Use(_) => continue,
                 // Don't descend into submodules, they don't have the same `use` items in scope.
                 // FIXME: This isn't true due to `super::*` imports?
-                ast::Module(_it) => continue,
+                ast::Module(_) => continue,
                 ast::Path(p) => if maybe_replace_path(p.clone(), path.clone()).is_none() {
                     shorten_paths(p.syntax(), path);
                 },
diff --git a/crates/ide_completion/src/context.rs b/crates/ide_completion/src/context.rs
index d459e51161..c6af285e86 100644
--- a/crates/ide_completion/src/context.rs
+++ b/crates/ide_completion/src/context.rs
@@ -517,7 +517,7 @@ impl<'a> CompletionContext<'a> {
 
                         (ty, name)
                     },
-                    ast::ArgList(_it) => {
+                    ast::ArgList(_) => {
                         cov_mark::hit!(expected_type_fn_param);
                         ActiveParameter::at_token(
                             &self.sema,
@@ -608,9 +608,9 @@ impl<'a> CompletionContext<'a> {
                             .map(|c| (Some(c.return_type()), None))
                             .unwrap_or((None, None))
                     },
-                    ast::ParamList(__) => (None, None),
-                    ast::Stmt(__) => (None, None),
-                    ast::Item(__) => (None, None),
+                    ast::ParamList(_) => (None, None),
+                    ast::Stmt(_) => (None, None),
+                    ast::Item(_) => (None, None),
                     _ => {
                         match node.parent() {
                             Some(n) => {
@@ -702,10 +702,10 @@ impl<'a> CompletionContext<'a> {
 
         Some(match_ast! {
             match parent {
-                ast::LifetimeParam(_it) => LifetimeContext::LifetimeParam(sema.find_node_at_offset_with_macros(original_file, offset)),
-                ast::BreakExpr(_it) => LifetimeContext::LabelRef,
-                ast::ContinueExpr(_it) => LifetimeContext::LabelRef,
-                ast::Label(_it) => LifetimeContext::LabelDef,
+                ast::LifetimeParam(_) => LifetimeContext::LifetimeParam(sema.find_node_at_offset_with_macros(original_file, offset)),
+                ast::BreakExpr(_) => LifetimeContext::LabelRef,
+                ast::ContinueExpr(_) => LifetimeContext::LabelRef,
+                ast::Label(_) => LifetimeContext::LabelDef,
                 _ => LifetimeContext::Lifetime,
             }
         })
@@ -753,7 +753,7 @@ impl<'a> CompletionContext<'a> {
         path_ctx.kind  = path.syntax().ancestors().find_map(|it| {
             match_ast! {
                 match it {
-                    ast::PathType(_it) => Some(PathKind::Type),
+                    ast::PathType(_) => Some(PathKind::Type),
                     ast::PathExpr(it) => {
                         path_ctx.has_call_parens = it.syntax().parent().map_or(false, |it| ast::CallExpr::can_cast(it.kind()));
                         Some(PathKind::Expr)
@@ -772,9 +772,9 @@ impl<'a> CompletionContext<'a> {
                         Some(PathKind::Pat)
                     },
                     ast::MacroCall(it) => it.excl_token().and(Some(PathKind::Mac)),
-                    ast::Meta(_it) => Some(PathKind::Attr),
+                    ast::Meta(_) => Some(PathKind::Attr),
                     ast::Visibility(it) => Some(PathKind::Vis { has_in_token: it.in_token().is_some() }),
-                    ast::UseTree(_it) => Some(PathKind::Use),
+                    ast::UseTree(_) => Some(PathKind::Use),
                     _ => None,
                 }
             }
@@ -851,9 +851,9 @@ fn pattern_context_for(pat: ast::Pat) -> PatternContext {
                         });
                         return (PatternRefutability::Irrefutable, param.ty().is_some())
                     },
-                    ast::MatchArm(__) => PatternRefutability::Refutable,
-                    ast::Condition(__) => PatternRefutability::Refutable,
-                    ast::ForExpr(__) => PatternRefutability::Irrefutable,
+                    ast::MatchArm(_) => PatternRefutability::Refutable,
+                    ast::Condition(_) => PatternRefutability::Refutable,
+                    ast::ForExpr(_) => PatternRefutability::Irrefutable,
                     _ => PatternRefutability::Irrefutable,
                 }
             };
diff --git a/crates/ide_completion/src/patterns.rs b/crates/ide_completion/src/patterns.rs
index b50f76b911..41e2423f46 100644
--- a/crates/ide_completion/src/patterns.rs
+++ b/crates/ide_completion/src/patterns.rs
@@ -100,7 +100,7 @@ pub(crate) fn determine_prev_sibling(name_like: &ast::NameLike) -> Option<Immedi
         let res = match_ast! {
             match prev_sibling {
                 // vis followed by random ident will always error the parser
-                ast::Visibility(_it) => ImmediatePrevSibling::Visibility,
+                ast::Visibility(_) => ImmediatePrevSibling::Visibility,
                 _ => return None,
             }
         };
@@ -112,7 +112,7 @@ pub(crate) fn determine_prev_sibling(name_like: &ast::NameLike) -> Option<Immedi
                 let node = it.expr().filter(|_| it.semicolon_token().is_none())?.syntax().clone();
                 match_ast! {
                     match node {
-                        ast::IfExpr(_it) => ImmediatePrevSibling::IfExpr,
+                        ast::IfExpr(_) => ImmediatePrevSibling::IfExpr,
                         _ => return None,
                     }
                 }
@@ -128,7 +128,7 @@ pub(crate) fn determine_prev_sibling(name_like: &ast::NameLike) -> Option<Immedi
                 } else {
                     return None
             },
-            ast::Attr(_it) => ImmediatePrevSibling::Attribute,
+            ast::Attr(_) => ImmediatePrevSibling::Attribute,
             _ => return None,
         }
     };
@@ -200,31 +200,31 @@ pub(crate) fn determine_location(
 
     let res = match_ast! {
         match parent {
-            ast::IdentPat(_it) => ImmediateLocation::IdentPat,
-            ast::Rename(_it) => ImmediateLocation::Rename,
-            ast::StmtList(_it) => ImmediateLocation::StmtList,
-            ast::SourceFile(_it) => ImmediateLocation::ItemList,
-            ast::ItemList(_it) => ImmediateLocation::ItemList,
-            ast::RefExpr(_it) => ImmediateLocation::RefExpr,
-            ast::Variant(_it) => ImmediateLocation::Variant,
+            ast::IdentPat(_) => ImmediateLocation::IdentPat,
+            ast::Rename(_) => ImmediateLocation::Rename,
+            ast::StmtList(_) => ImmediateLocation::StmtList,
+            ast::SourceFile(_) => ImmediateLocation::ItemList,
+            ast::ItemList(_) => ImmediateLocation::ItemList,
+            ast::RefExpr(_) => ImmediateLocation::RefExpr,
+            ast::Variant(_) => ImmediateLocation::Variant,
             ast::RecordField(it) => if it.ty().map_or(false, |it| it.syntax().text_range().contains(offset)) {
                 return None;
             } else {
                 ImmediateLocation::RecordField
             },
-            ast::RecordExprFieldList(_it) => sema
+            ast::RecordExprFieldList(_) => sema
                 .find_node_at_offset_with_macros(original_file, offset)
                 .map(ImmediateLocation::RecordExprUpdate)?,
-            ast::TupleField(_it) => ImmediateLocation::TupleField,
-            ast::TupleFieldList(_it) => ImmediateLocation::TupleField,
-            ast::TypeBound(_it) => ImmediateLocation::TypeBound,
-            ast::TypeBoundList(_it) => ImmediateLocation::TypeBound,
+            ast::TupleField(_) => ImmediateLocation::TupleField,
+            ast::TupleFieldList(_) => ImmediateLocation::TupleField,
+            ast::TypeBound(_) => ImmediateLocation::TypeBound,
+            ast::TypeBoundList(_) => ImmediateLocation::TypeBound,
             ast::AssocItemList(it) => match it.syntax().parent().map(|it| it.kind()) {
                 Some(IMPL) => ImmediateLocation::Impl,
                 Some(TRAIT) => ImmediateLocation::Trait,
                 _ => return None,
             },
-            ast::GenericArgList(_it) => sema
+            ast::GenericArgList(_) => sema
                 .find_node_at_offset_with_macros(original_file, offset)
                 .map(ImmediateLocation::GenericArgList)?,
             ast::Module(it) => {
diff --git a/crates/ide_db/src/search.rs b/crates/ide_db/src/search.rs
index c23a9ee257..0d0f7b78d8 100644
--- a/crates/ide_db/src/search.rs
+++ b/crates/ide_db/src/search.rs
@@ -657,7 +657,7 @@ impl ReferenceCategory {
 
         let mode = r.syntax().ancestors().find_map(|node| {
         match_ast! {
-            match (node) {
+            match node {
                 ast::BinExpr(expr) => {
                     if matches!(expr.op_kind()?, ast::BinaryOp::Assignment { .. }) {
                         // If the variable or field ends on the LHS's end then it's a Write (covers fields and locals).
diff --git a/crates/syntax/src/lib.rs b/crates/syntax/src/lib.rs
index 24a099cb3c..ec281625a6 100644
--- a/crates/syntax/src/lib.rs
+++ b/crates/syntax/src/lib.rs
@@ -242,7 +242,7 @@ macro_rules! match_ast {
     (match $node:ident { $($tt:tt)* }) => { match_ast!(match ($node) { $($tt)* }) };
 
     (match ($node:expr) {
-        $( ast::$ast:ident($it:ident) => $res:expr, )*
+        $( ast::$ast:ident($it:pat) => $res:expr, )*
         _ => $catch_all:expr $(,)?
     }) => {{
         $( if let Some($it) = ast::$ast::cast($node.clone()) { $res } else )*
diff --git a/crates/syntax/src/validation.rs b/crates/syntax/src/validation.rs
index a0a0bab5b3..8dc47e0bd3 100644
--- a/crates/syntax/src/validation.rs
+++ b/crates/syntax/src/validation.rs
@@ -275,7 +275,7 @@ fn validate_path_keywords(segment: ast::PathSegment, errors: &mut Vec<SyntaxErro
                             return Some(tree_path);
                         }
                     },
-                    ast::UseTreeList(_it) => continue,
+                    ast::UseTreeList(_) => continue,
                     ast::Path(parent) => path = parent,
                     _ => return None,
                 }