1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/c-variadic/not-async.stderr b/tests/ui/c-variadic/not-async.stderr
new file mode 100644
index 00000000000..b8caf0d8bd8
--- /dev/null
+++ b/tests/ui/c-variadic/not-async.stderr
@@ -0,0 +1,19 @@
+error: functions cannot be both `async` and C-variadic
+  --> $DIR/not-async.rs:5:1
+   |
+LL | async unsafe extern "C" fn cannot_be_async(x: isize, ...) {}
+   | ^^^^^ `async` because of this                        ^^^ C-variadic because of this
+
+error[E0700]: hidden type for `impl Future<Output = ()>` captures lifetime that does not appear in bounds
+  --> $DIR/not-async.rs:5:59
+   |
+LL | async unsafe extern "C" fn cannot_be_async(x: isize, ...) {}
+   | --------------------------------------------------------- ^^
+   | |
+   | opaque type defined here
+   |
+   = note: hidden type `{async fn body of cannot_be_async()}` captures lifetime `'_`
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0700`.