fix clippy::clone_on_ref_ptr for compiler

2 files changed, 3 insertions, 2 deletions

diff --git a/compiler/rustc_expand/src/mbe/macro_parser.rs b/compiler/rustc_expand/src/mbe/macro_parser.rs
index 3903203da3d..a08db612bbe 100644
--- a/compiler/rustc_expand/src/mbe/macro_parser.rs
+++ b/compiler/rustc_expand/src/mbe/macro_parser.rs
@@ -622,7 +622,7 @@ impl TtParser {
         // possible next positions into `next_mps`. After some post-processing, the contents of
         // `next_mps` replenish `cur_mps` and we start over again.
         self.cur_mps.clear();
-        self.cur_mps.push(MatcherPos { idx: 0, matches: self.empty_matches.clone() });
+        self.cur_mps.push(MatcherPos { idx: 0, matches: Rc::clone(&self.empty_matches) });
 
         loop {
             self.next_mps.clear();
diff --git a/compiler/rustc_expand/src/mbe/transcribe.rs b/compiler/rustc_expand/src/mbe/transcribe.rs
index 34811ca2b35..b77d02e630a 100644
--- a/compiler/rustc_expand/src/mbe/transcribe.rs
+++ b/compiler/rustc_expand/src/mbe/transcribe.rs
@@ -5,6 +5,7 @@ use rustc_ast::mut_visit::{self, MutVisitor};
 use rustc_ast::token::{self, Delimiter, IdentIsRaw, Lit, LitKind, Nonterminal, Token, TokenKind};
 use rustc_ast::tokenstream::{DelimSpacing, DelimSpan, Spacing, TokenStream, TokenTree};
 use rustc_data_structures::fx::FxHashMap;
+use rustc_data_structures::sync::Lrc;
 use rustc_errors::{Diag, DiagCtxtHandle, PResult, pluralize};
 use rustc_parse::lexer::nfc_normalize;
 use rustc_parse::parser::ParseNtResult;
@@ -293,7 +294,7 @@ pub(super) fn transcribe<'a>(
                             // `Delimiter::Invisible` to maintain parsing priorities.
                             // `Interpolated` is currently used for such groups in rustc parser.
                             marker.visit_span(&mut sp);
-                            TokenTree::token_alone(token::Interpolated(nt.clone()), sp)
+                            TokenTree::token_alone(token::Interpolated(Lrc::clone(nt)), sp)
                         }
                         MatchedSeq(..) => {
                             // We were unable to descend far enough. This is an error.