diff --git a/crates/ruff_python_formatter/src/expression/expr_subscript.rs b/crates/ruff_python_formatter/src/expression/expr_subscript.rs
index 9d5182dd2d..47089d2893 100644
--- a/crates/ruff_python_formatter/src/expression/expr_subscript.rs
+++ b/crates/ruff_python_formatter/src/expression/expr_subscript.rs
@@ -27,7 +27,7 @@ impl FormatNodeRule<ExprSubscript> for FormatExprSubscript {
         let dangling_comments = comments.dangling_comments(item.as_any_node_ref());
         debug_assert!(
             dangling_comments.len() <= 1,
-            "The subscript expression must have at most a single comment, the one after the bracket"
+            "A subscript expression can only have a single dangling comment, the one after the bracket"
         );
 
         if let NodeLevel::Expression(Some(group_id)) = f.context().node_level() {
diff --git a/scripts/formatter_progress.sh b/scripts/formatter_progress.sh
index 088f8d56b2..b213a27fd9 100755
--- a/scripts/formatter_progress.sh
+++ b/scripts/formatter_progress.sh
@@ -51,5 +51,9 @@ fi
 # for i in "$dir"/*/; do git -C "$i" switch main && git -C "$i" pull && echo "# $(basename "$i") $(git -C "$i" rev-parse HEAD)"; done
 
 time cargo run --bin ruff_dev -- format-dev --stability-check --error-file "$target/progress_projects_errors.txt" \
-  --multi-project "$dir" >"$target/progress_projects_report.txt"
+  --multi-project "$dir" >"$target/progress_projects_report.txt" || (
+  echo "Ecosystem check failed"
+  cat "$target/progress_projects_report.txt"
+  exit 1
+)
 grep "similarity index" "$target/progress_projects_report.txt" | sort