--- /dev/null
+// only-x86_64
+
+#![feature(start)]
+#![feature(target_feature_11)]
+
+#[start]
+#[target_feature(enable = "avx2")]
+//~^ ERROR `start` is not allowed to have `#[target_feature]`
+fn start(_argc: isize, _argv: *const *const u8) -> isize { 0 }