add test case for issue-61076

Author: csmoe

src/test/ui/async-await/issue-61076.rs

@@ -0,0 +1,12 @@
+// edition:2018
+
+async fn foo() -> Result<(), ()> {
+    Ok(())
+}
+
+async fn bar() -> Result<(), ()> {
+    foo()?;
+    Ok(())
+}
+
+fn main() {}