From 8c71820e176a8a9711f28c183812e7aaff4e1ffb Mon Sep 17 00:00:00 2001
From: Thom Chiovoloni <thom@shift.click>
Date: Mon, 31 Oct 2022 04:21:14 -0700
Subject: [PATCH] smoketest that libtest doesn't panic in `#[bench]`

---
 src/test/run-make/test-benches/Makefile      |  9 +++++++++
 src/test/run-make/test-benches/smokebench.rs | 14 ++++++++++++++
 2 files changed, 23 insertions(+)
 create mode 100644 src/test/run-make/test-benches/Makefile
 create mode 100644 src/test/run-make/test-benches/smokebench.rs

diff --git a/src/test/run-make/test-benches/Makefile b/src/test/run-make/test-benches/Makefile
new file mode 100644
index 000000000000..4df106fad144
--- /dev/null
+++ b/src/test/run-make/test-benches/Makefile
@@ -0,0 +1,9 @@
+include ../../run-make-fulldeps/tools.mk
+
+all:
+	# Smoke-test that `#[bench]` isn't entirely broken.
+	$(RUSTC) --test smokebench.rs -O
+	$(call RUN,smokebench --bench)
+	$(call RUN,smokebench --bench noiter)
+	$(call RUN,smokebench --bench yesiter)
+	$(call RUN,smokebench)
diff --git a/src/test/run-make/test-benches/smokebench.rs b/src/test/run-make/test-benches/smokebench.rs
new file mode 100644
index 000000000000..ef5e5a620684
--- /dev/null
+++ b/src/test/run-make/test-benches/smokebench.rs
@@ -0,0 +1,14 @@
+#![feature(test)]
+extern crate test;
+
+#[bench]
+fn smoke_yesiter(b: &mut test::Bencher) {
+    let mut i = 0usize;
+    b.iter(|| {
+        i = i.wrapping_add(1);
+        i
+    })
+}
+
+#[bench]
+fn smoke_noiter(_: &mut test::Bencher) {}