1 files changed, 22 insertions, 20 deletions
diff --git a/src/tools/clippy/clippy_lints/src/unit_types/unit_arg.rs b/src/tools/clippy/clippy_lints/src/unit_types/unit_arg.rs
index 97d92f10e..a6f777abc 100644
--- a/src/tools/clippy/clippy_lints/src/unit_types/unit_arg.rs
+++ b/src/tools/clippy/clippy_lints/src/unit_types/unit_arg.rs
@@ -1,4 +1,5 @@
 use clippy_utils::diagnostics::span_lint_and_then;
+use clippy_utils::is_from_proc_macro;
 use clippy_utils::source::{indent_of, reindent_multiline, snippet_opt};
 use if_chain::if_chain;
 use rustc_errors::Applicability;
@@ -7,7 +8,7 @@ use rustc_lint::LateContext;
 
 use super::{utils, UNIT_ARG};
 
-pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>) {
+pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) {
     if expr.span.from_expansion() {
         return;
     }
@@ -29,26 +30,27 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>) {
         }
     }
 
-    match expr.kind {
-        ExprKind::Call(_, args) | ExprKind::MethodCall(_, args, _) => {
-            let args_to_recover = args
-                .iter()
-                .filter(|arg| {
-                    if cx.typeck_results().expr_ty(arg).is_unit() && !utils::is_unit_literal(arg) {
-                        !matches!(
-                            &arg.kind,
-                            ExprKind::Match(.., MatchSource::TryDesugar) | ExprKind::Path(..)
-                        )
-                    } else {
-                        false
-                    }
-                })
-                .collect::<Vec<_>>();
-            if !args_to_recover.is_empty() {
-                lint_unit_args(cx, expr, &args_to_recover);
+    let args: Vec<_> = match expr.kind {
+        ExprKind::Call(_, args) => args.iter().collect(),
+        ExprKind::MethodCall(_, receiver, args, _) => std::iter::once(receiver).chain(args.iter()).collect(),
+        _ => return,
+    };
+
+    let args_to_recover = args
+        .into_iter()
+        .filter(|arg| {
+            if cx.typeck_results().expr_ty(arg).is_unit() && !utils::is_unit_literal(arg) {
+                !matches!(
+                    &arg.kind,
+                    ExprKind::Match(.., MatchSource::TryDesugar) | ExprKind::Path(..)
+                )
+            } else {
+                false
             }
-        },
-        _ => (),
+        })
+        .collect::<Vec<_>>();
+    if !args_to_recover.is_empty() && !is_from_proc_macro(cx, expr) {
+        lint_unit_args(cx, expr, args_to_recover.as_slice());
     }
 }