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+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Regression test for #29859, initial version. This example allowed
+// arbitrary trait bounds to be synthesized.
+
+// Trait that you want all types to implement.
+use std::marker::{Sync as Trait};
+
+pub trait Magic {
+    type X: Trait;
+}
+impl<T: Magic> Magic for T {
+    type X = Self;
+}
+
+fn check<T: Trait>() {}
+
+fn wizard<T: Magic>() { check::<<T as Magic>::X>(); }
+
+fn main() {
+    wizard::<*mut ()>(); //~ ERROR E0275
+    // check::<*mut ()>();
+}