test(diagnostic): Show panic

tests/testsuite/diagnostics.rs

@@ -0,0 +1,23 @@
+use cargo_test_support::project;
+
+#[cargo_test]
+fn dont_panic_on_render() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+[package]
+name = "foo"
+version = "0.1.0"
+edition = "2021"
+[[bench.foo]]
+"#,
+        )
+        .file("src/lib.rs", "")
+        .build();
+
+    p.cargo("check")
+        .with_status(101)
+        .with_stderr_contains("attempt to subtract with overflow")
+        .run();
+}

tests/testsuite/main.rs

@@ -79,6 +79,7 @@ mod cross_publish;
 mod custom_target;
 mod death;
 mod dep_info;
+mod diagnostics;
 mod direct_minimal_versions;
 mod directory;
 mod doc;