Add tests for WellFormed-Type and FromEnv-Type rules

src/test/ui/chalkify/lower_struct.rs

@@ -0,0 +1,18 @@
+// Copyright 2018 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.
+
+#![feature(rustc_attrs)]
+
+#[rustc_dump_program_clauses] //~ ERROR program clause dump
+struct Foo<T> where Box<T>: Clone {
+    _x: std::marker::PhantomData<T>,
+}
+
+fn main() { }

src/test/ui/chalkify/lower_struct.stderr

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+error: program clause dump
+  --> $DIR/lower_struct.rs:13:1
+   |
+LL | #[rustc_dump_program_clauses] //~ ERROR program clause dump
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: FromEnv(T: std::marker::Sized) :- FromEnv(Foo<T>).
+   = note: FromEnv(std::boxed::Box<T>: std::clone::Clone) :- FromEnv(Foo<T>).
+   = note: WellFormed(Foo<T>) :- Implemented(T: std::marker::Sized), Implemented(std::boxed::Box<T>: std::clone::Clone).
+
+error: aborting due to previous error
+