Auto merge of #45020 - MaloJaffre:needs-test, r=alexcrichton

Fix some E-needstest issues.

Also ignore `attr-on-trait` test on stage-1 to keep `./x.py test --stage 1` successful.

Fixes #30355.
Fixes #33241.
Fixes #36400.
Fixes #37887.
Fixes #44578.

Author: bors

src/test/compile-fail/issue-30355.rs

@@ -0,0 +1,21 @@
+// Copyright 2017 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.
+
+pub struct X([u8]);
+
+pub static Y: &'static X = {
+    const Y: &'static [u8] = b"";
+    &X(*Y)
+    //~^ ERROR cannot move out
+    //~^^ ERROR cannot move a
+    //~^^^ ERROR cannot move a
+};
+
+fn main() {}

src/test/compile-fail/issue-33241.rs

@@ -0,0 +1,23 @@
+// Copyright 2017 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)]
+
+use std::fmt;
+
+// CoerceUnsized is not implemented for tuples. You can still create
+// an unsized tuple by transmuting a trait object.
+fn any<T>() -> T { unreachable!() }
+
+#[rustc_error]
+fn main() { //~ ERROR compilation successful
+    let t: &(u8, fmt::Debug) = any();
+    println!("{:?}", &t.1);
+}

src/test/compile-fail/issue-37887.rs

@@ -0,0 +1,14 @@
+// Copyright 2017 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.
+
+fn main() {
+    extern crate libc; //~ ERROR use of unstable
+    use libc::*; //~ ERROR unresolved import
+}

src/test/compile-fail/issue-44578.rs

@@ -0,0 +1,34 @@
+// Copyright 2017 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.
+
+trait Foo {
+    const AMT: usize;
+}
+
+enum Bar<A, B> {
+    First(A),
+    Second(B),
+}
+
+impl<A: Foo, B: Foo> Foo for Bar<A, B> {
+    const AMT: usize = [A::AMT][(A::AMT > B::AMT) as usize]; //~ ERROR constant evaluation
+}
+
+impl Foo for u8 {
+    const AMT: usize = 1;
+}
+
+impl Foo for u16 {
+    const AMT: usize = 2;
+}
+
+fn main() {
+    println!("{}", <Bar<u16, u8> as Foo>::AMT);
+}

src/test/run-pass-fulldeps/proc-macro/attr-on-trait.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // aux-build:attr-on-trait.rs
+// ignore-stage1
 
 #![feature(proc_macro)]
 

src/test/ui/issue-36400.rs

@@ -0,0 +1,16 @@
+// Copyright 2017 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.
+
+fn f(x: &mut u32) {}
+
+fn main() {
+    let x = Box::new(3);
+    f(&mut *x);
+}

src/test/ui/issue-36400.stderr

@@ -0,0 +1,10 @@
+error[E0596]: cannot borrow immutable `Box` content `*x` as mutable
+  --> $DIR/issue-36400.rs:15:12
+   |
+14 |     let x = Box::new(3);
+   |         - consider changing this to `mut x`
+15 |     f(&mut *x);
+   |            ^^ cannot borrow as mutable
+
+error: aborting due to previous error
+