1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ui/async-await/issue-62658.rs b/tests/ui/async-await/issue-62658.rs
new file mode 100644
index 00000000000..d0af01e0c00
--- /dev/null
+++ b/tests/ui/async-await/issue-62658.rs
@@ -0,0 +1,27 @@
+// This test created a generator whose size was not rounded to a multiple of its
+// alignment. This caused an assertion error in codegen.
+
+// build-pass
+// edition:2018
+
+async fn noop() {}
+
+async fn foo() {
+    // This suspend should be the largest variant.
+    {
+        let x = [0u8; 17];
+        noop().await;
+        println!("{:?}", x);
+    }
+
+    // Add one variant that's aligned to 8 bytes.
+    {
+        let x = 0u64;
+        noop().await;
+        println!("{:?}", x);
+    }
+}
+
+fn main() {
+    let _ = foo();
+}