3 files changed, 14 insertions, 16 deletions
diff --git a/compiler/rustc_errors/src/emitter.rs b/compiler/rustc_errors/src/emitter.rs
index 961feba3250..44654571d43 100644
--- a/compiler/rustc_errors/src/emitter.rs
+++ b/compiler/rustc_errors/src/emitter.rs
@@ -2145,7 +2145,7 @@ impl EmitterWriter {
                         &mut self.dst,
                         self.short_message,
                     ) {
-                        panic!("failed to emit error: {}", e)
+                        panic!("failed to emit error: {e}")
                     }
                 }
                 if !self.short_message {
@@ -2161,7 +2161,7 @@ impl EmitterWriter {
                             true,
                             None,
                         ) {
-                            panic!("failed to emit error: {}", err);
+                            panic!("failed to emit error: {err}");
                         }
                     }
                     for sugg in suggestions {
@@ -2180,7 +2180,7 @@ impl EmitterWriter {
                                     true,
                                     None,
                                 ) {
-                                    panic!("failed to emit error: {}", e);
+                                    panic!("failed to emit error: {e}");
                                 }
                             }
                             SuggestionStyle::HideCodeInline
@@ -2193,22 +2193,22 @@ impl EmitterWriter {
                                     &Level::Help,
                                     max_line_num_len,
                                 ) {
-                                    panic!("failed to emit error: {}", e);
+                                    panic!("failed to emit error: {e}");
                                 }
                             }
                         }
                     }
                 }
             }
-            Err(e) => panic!("failed to emit error: {}", e),
+            Err(e) => panic!("failed to emit error: {e}"),
         }
 
         let mut dst = self.dst.writable();
         match writeln!(dst) {
-            Err(e) => panic!("failed to emit error: {}", e),
+            Err(e) => panic!("failed to emit error: {e}"),
             _ => {
                 if let Err(e) = dst.flush() {
-                    panic!("failed to emit error: {}", e)
+                    panic!("failed to emit error: {e}")
                 }
             }
         }
diff --git a/compiler/rustc_errors/src/json.rs b/compiler/rustc_errors/src/json.rs
index f32d6b96b9b..55f7c485024 100644
--- a/compiler/rustc_errors/src/json.rs
+++ b/compiler/rustc_errors/src/json.rs
@@ -159,7 +159,7 @@ impl Emitter for JsonEmitter {
         }
         .and_then(|_| self.dst.flush());
         if let Err(e) = result {
-            panic!("failed to print diagnostics: {:?}", e);
+            panic!("failed to print diagnostics: {e:?}");
         }
     }
 
@@ -172,7 +172,7 @@ impl Emitter for JsonEmitter {
         }
         .and_then(|_| self.dst.flush());
         if let Err(e) = result {
-            panic!("failed to print notification: {:?}", e);
+            panic!("failed to print notification: {e:?}");
         }
     }
 
@@ -194,7 +194,7 @@ impl Emitter for JsonEmitter {
         }
         .and_then(|_| self.dst.flush());
         if let Err(e) = result {
-            panic!("failed to print future breakage report: {:?}", e);
+            panic!("failed to print future breakage report: {e:?}");
         }
     }
 
@@ -208,7 +208,7 @@ impl Emitter for JsonEmitter {
         }
         .and_then(|_| self.dst.flush());
         if let Err(e) = result {
-            panic!("failed to print unused externs: {:?}", e);
+            panic!("failed to print unused externs: {e:?}");
         }
     }
 
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index 2181bd526eb..3d1639db4af 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -1720,13 +1720,11 @@ impl HandlerInner {
                 (count, delayed_count, as_bug) => {
                     if delayed_count > 0 {
                         panic!(
-                            "aborting after {} errors and {} delayed bugs due to `-Z treat-err-as-bug={}`",
-                            count, delayed_count, as_bug,
+                            "aborting after {count} errors and {delayed_count} delayed bugs due to `-Z treat-err-as-bug={as_bug}`",
                         )
                     } else {
                         panic!(
-                            "aborting after {} errors due to `-Z treat-err-as-bug={}`",
-                            count, as_bug,
+                            "aborting after {count} errors due to `-Z treat-err-as-bug={as_bug}`",
                         )
                     }
                 }
@@ -1862,7 +1860,7 @@ pub fn add_elided_lifetime_in_path_suggestion(
     }
     let anon_lts = vec!["'_"; n].join(", ");
     let suggestion =
-        if incl_angl_brckt { format!("<{}>", anon_lts) } else { format!("{}, ", anon_lts) };
+        if incl_angl_brckt { format!("<{anon_lts}>") } else { format!("{anon_lts}, ") };
 
     diag.subdiagnostic(IndicateAnonymousLifetime {
         span: insertion_span.shrink_to_hi(),