6 files changed, 12 insertions, 15 deletions
diff --git a/compiler/rustc_span/src/def_id.rs b/compiler/rustc_span/src/def_id.rs
index 221f65b66e6..7c5e1427d1e 100644
--- a/compiler/rustc_span/src/def_id.rs
+++ b/compiler/rustc_span/src/def_id.rs
@@ -303,7 +303,7 @@ impl DefId {
         // i.e. don't use closures.
         match self.as_local() {
             Some(local_def_id) => local_def_id,
-            None => panic!("DefId::expect_local: `{:?}` isn't local", self),
+            None => panic!("DefId::expect_local: `{self:?}` isn't local"),
         }
     }
 
diff --git a/compiler/rustc_span/src/edition.rs b/compiler/rustc_span/src/edition.rs
index 065d3660e50..b43183916bc 100644
--- a/compiler/rustc_span/src/edition.rs
+++ b/compiler/rustc_span/src/edition.rs
@@ -44,7 +44,7 @@ impl fmt::Display for Edition {
             Edition::Edition2021 => "2021",
             Edition::Edition2024 => "2024",
         };
-        write!(f, "{}", s)
+        write!(f, "{s}")
     }
 }
 
diff --git a/compiler/rustc_span/src/hygiene.rs b/compiler/rustc_span/src/hygiene.rs
index 4e70dfb6147..a9a9a3fbf9d 100644
--- a/compiler/rustc_span/src/hygiene.rs
+++ b/compiler/rustc_span/src/hygiene.rs
@@ -110,7 +110,7 @@ fn assert_default_hashing_controls<CTX: HashStableContext>(ctx: &CTX, msg: &str)
         // Such configuration must not be used for metadata.
         HashingControls { hash_spans }
             if hash_spans == !ctx.unstable_opts_incremental_ignore_spans() => {}
-        other => panic!("Attempted hashing of {msg} with non-default HashingControls: {:?}", other),
+        other => panic!("Attempted hashing of {msg} with non-default HashingControls: {other:?}"),
     }
 }
 
@@ -629,7 +629,7 @@ pub fn update_dollar_crate_names(mut get_name: impl FnMut(SyntaxContext) -> Symb
 pub fn debug_hygiene_data(verbose: bool) -> String {
     HygieneData::with(|data| {
         if verbose {
-            format!("{:#?}", data)
+            format!("{data:#?}")
         } else {
             let mut s = String::from("Expansions:");
             let mut debug_expn_data = |(id, expn_data): (&ExpnId, &ExpnData)| {
@@ -1067,9 +1067,9 @@ impl ExpnKind {
         match *self {
             ExpnKind::Root => kw::PathRoot.to_string(),
             ExpnKind::Macro(macro_kind, name) => match macro_kind {
-                MacroKind::Bang => format!("{}!", name),
-                MacroKind::Attr => format!("#[{}]", name),
-                MacroKind::Derive => format!("#[derive({})]", name),
+                MacroKind::Bang => format!("{name}!"),
+                MacroKind::Attr => format!("#[{name}]"),
+                MacroKind::Derive => format!("#[derive({name})]"),
             },
             ExpnKind::AstPass(kind) => kind.descr().to_string(),
             ExpnKind::Desugaring(kind) => format!("desugaring of {}", kind.descr()),
@@ -1466,11 +1466,7 @@ impl<D: Decoder> Decodable<D> for SyntaxContext {
 /// collisions are only possible between `ExpnId`s within the same crate.
 fn update_disambiguator(expn_data: &mut ExpnData, mut ctx: impl HashStableContext) -> ExpnHash {
     // This disambiguator should not have been set yet.
-    assert_eq!(
-        expn_data.disambiguator, 0,
-        "Already set disambiguator for ExpnData: {:?}",
-        expn_data
-    );
+    assert_eq!(expn_data.disambiguator, 0, "Already set disambiguator for ExpnData: {expn_data:?}");
     assert_default_hashing_controls(&ctx, "ExpnData (disambiguator)");
     let mut expn_hash = expn_data.hash_expn(&mut ctx);
 
diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs
index bee4b0a2332..7e61f2f9f73 100644
--- a/compiler/rustc_span/src/lib.rs
+++ b/compiler/rustc_span/src/lib.rs
@@ -329,7 +329,7 @@ impl fmt::Display for FileNameDisplay<'_> {
             ProcMacroSourceCode(_) => write!(fmt, "<proc-macro source code>"),
             CfgSpec(_) => write!(fmt, "<cfgspec>"),
             CliCrateAttr(_) => write!(fmt, "<crate attribute>"),
-            Custom(ref s) => write!(fmt, "<{}>", s),
+            Custom(ref s) => write!(fmt, "<{s}>"),
             DocTest(ref path, _) => write!(fmt, "{}", path.display()),
             InlineAsm(_) => write!(fmt, "<inline asm>"),
         }
@@ -1074,7 +1074,7 @@ impl NonNarrowChar {
             0 => NonNarrowChar::ZeroWidth(pos),
             2 => NonNarrowChar::Wide(pos),
             4 => NonNarrowChar::Tab(pos),
-            _ => panic!("width {} given for non-narrow character", width),
+            _ => panic!("width {width} given for non-narrow character"),
         }
     }
 
diff --git a/compiler/rustc_span/src/profiling.rs b/compiler/rustc_span/src/profiling.rs
index f169007fab4..0ab890b9f01 100644
--- a/compiler/rustc_span/src/profiling.rs
+++ b/compiler/rustc_span/src/profiling.rs
@@ -27,7 +27,7 @@ impl SpannedEventArgRecorder for EventArgRecorder<'_> {
             if let Some(source_map) = &*session_globals.source_map.borrow() {
                 source_map.span_to_embeddable_string(span)
             } else {
-                format!("{:?}", span)
+                format!("{span:?}")
             }
         });
         self.record_arg(span_arg);
diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
index 85510fa2c66..5d5f8d6d654 100644
--- a/compiler/rustc_span/src/symbol.rs
+++ b/compiler/rustc_span/src/symbol.rs
@@ -193,6 +193,7 @@ symbols! {
         FromIterator,
         FromResidual,
         Future,
+        FutureOutput,
         FxHashMap,
         FxHashSet,
         GlobalAlloc,