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-rw-r--r--compiler/rustc_interface/src/callbacks.rs2
-rw-r--r--compiler/rustc_interface/src/queries.rs2
2 files changed, 2 insertions, 2 deletions
diff --git a/compiler/rustc_interface/src/callbacks.rs b/compiler/rustc_interface/src/callbacks.rs
index ef00ced67ff..7458be2c86d 100644
--- a/compiler/rustc_interface/src/callbacks.rs
+++ b/compiler/rustc_interface/src/callbacks.rs
@@ -29,7 +29,7 @@ fn track_span_parent(def_id: rustc_span::def_id::LocalDefId) {
 /// This is a callback from `rustc_errors` as it cannot access the implicit state
 /// in `rustc_middle` otherwise. It is used when diagnostic messages are
 /// emitted and stores them in the current query, if there is one.
-fn track_diagnostic(diagnostic: &mut Diagnostic, f: &mut dyn FnMut(&mut Diagnostic)) {
+fn track_diagnostic(diagnostic: Diagnostic, f: &mut dyn FnMut(Diagnostic)) {
     tls::with_context_opt(|icx| {
         if let Some(icx) = icx {
             if let Some(diagnostics) = icx.diagnostics {
diff --git a/compiler/rustc_interface/src/queries.rs b/compiler/rustc_interface/src/queries.rs
index 07bbe78dc2d..9da806e0779 100644
--- a/compiler/rustc_interface/src/queries.rs
+++ b/compiler/rustc_interface/src/queries.rs
@@ -108,7 +108,7 @@ impl<'tcx> Queries<'tcx> {
 
     pub fn parse(&self) -> Result<QueryResult<'_, ast::Crate>> {
         self.parse.compute(|| {
-            passes::parse(&self.compiler.sess).map_err(|mut parse_error| parse_error.emit())
+            passes::parse(&self.compiler.sess).map_err(|parse_error| parse_error.emit())
         })
     }