1 files changed, 8 insertions, 11 deletions
diff --git a/compiler/rustc_mir/src/transform/coverage/debug.rs b/compiler/rustc_mir/src/transform/coverage/debug.rs
index 2cd0dc6b1f2..48361483099 100644
--- a/compiler/rustc_mir/src/transform/coverage/debug.rs
+++ b/compiler/rustc_mir/src/transform/coverage/debug.rs
@@ -121,6 +121,7 @@ use rustc_middle::mir::coverage::*;
 use rustc_middle::mir::{self, BasicBlock, TerminatorKind};
 use rustc_middle::ty::TyCtxt;
 
+use std::iter;
 use std::lazy::SyncOnceCell;
 
 pub const NESTED_INDENT: &str = "    ";
@@ -285,10 +286,8 @@ impl DebugCounters {
                 ),
             };
             counters
-                .insert(id, DebugCounter::new(counter_kind.clone(), some_block_label))
-                .expect_none(
-                    "attempt to add the same counter_kind to DebugCounters more than once",
-                );
+                .try_insert(id, DebugCounter::new(counter_kind.clone(), some_block_label))
+                .expect("attempt to add the same counter_kind to DebugCounters more than once");
         }
     }
 
@@ -479,9 +478,9 @@ impl GraphvizData {
         counter_kind: &CoverageKind,
     ) {
         if let Some(edge_to_counter) = self.some_edge_to_counter.as_mut() {
-            edge_to_counter.insert((from_bcb, to_bb), counter_kind.clone()).expect_none(
-                "invalid attempt to insert more than one edge counter for the same edge",
-            );
+            edge_to_counter
+                .try_insert((from_bcb, to_bb), counter_kind.clone())
+                .expect("invalid attempt to insert more than one edge counter for the same edge");
         }
     }
 
@@ -705,9 +704,7 @@ pub(super) fn dump_coverage_graphviz(
         let edge_counters = from_terminator
             .successors()
             .map(|&successor_bb| graphviz_data.get_edge_counter(from_bcb, successor_bb));
-        edge_labels
-            .iter()
-            .zip(edge_counters)
+        iter::zip(&edge_labels, edge_counters)
             .map(|(label, some_counter)| {
                 if let Some(counter) = some_counter {
                     format!("{}\n{}", label, debug_counters.format_counter(counter))
@@ -819,7 +816,7 @@ fn bcb_to_string_sections(
     sections
 }
 
-/// Returns a simple string representation of a `TerminatorKind` variant, indenpendent of any
+/// Returns a simple string representation of a `TerminatorKind` variant, independent of any
 /// values it might hold.
 pub(super) fn term_type(kind: &TerminatorKind<'tcx>) -> &'static str {
     match kind {