Add a test for check_arg_count.

diff --git a/tests/compile-fail/check_arg_count.rs b/tests/compile-fail/check_arg_count.rs
new file mode 100644 (file)
index 0000000..663fa60
--- /dev/null
+++ b/tests/compile-fail/check_arg_count.rs
@@ -0,0 +1,7 @@
+#![feature(core_intrinsics)]
+
+use std::intrinsics;
+
+fn main() {
+    unsafe { intrinsics::forget(); } //~ ERROR this function takes 1 argument but 0 arguments were supplied
+}