Auto merge of #54223 - pnkfelix:issue-53764-uiify-run-pass, r=nikomatsakis

`ui`ify run-pass

This addresses the remainder of #53764 by first converting `src/test/run-pass` into another `ui`-style test suite, and then turning on `compare-mode=nll` for that new suite.

After this lands, we can address #54047 for the short term by moving all the `src/test/ui/run-pass` tests back to `src/test/run-pass`.

(Longer term, the compiler team's current (hypothetical sketch of a) plan (see [1][], [2][]) is unify all the tests by embedding these meta-properties like "// run-pass` into their headers explicitly and dropping the significance of their location on the file system.)

[1]: https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/subject/weekly.20meeting.202018-09-13/near/133889370
[2]: #54047 (comment)

Author: bors

src/bootstrap/test.rs

@@ -755,10 +755,11 @@ default_test_with_compare_mode!(Ui {
     compare_mode: "nll"
 });
 
-default_test!(RunPass {
+default_test_with_compare_mode!(RunPass {
     path: "src/test/run-pass",
     mode: "run-pass",
-    suite: "run-pass"
+    suite: "run-pass",
+    compare_mode: "nll"
 });
 
 default_test!(CompileFail {

src/test/run-pass-fulldeps/ast_stmt_expr_attr.rs

@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![allow(unused_imports)]
 // ignore-cross-compile
 
 #![feature(rustc_private)]

src/test/run-pass-fulldeps/custom-derive-partial-eq.stderr

@@ -0,0 +1,6 @@
+warning: `#[derive]` for custom traits is deprecated and will be removed in the future. Prefer using procedural macro custom derive.
+  --> $DIR/custom-derive-partial-eq.rs:17:10
+   |
+LL | #[derive(CustomPartialEq)] // Check that this is not a stability error.
+   |          ^^^^^^^^^^^^^^^
+

src/test/run-pass-fulldeps/derive-no-std-not-supported.rs

@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![allow(dead_code)]
 #![feature(rustc_private)]
 #![no_std]
 

src/test/run-pass-fulldeps/deriving-encodable-decodable-box.rs

@@ -8,16 +8,18 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![allow(unused_imports)]
 
 #![feature(box_syntax)]
 #![feature(rustc_private)]
 
 extern crate serialize;
+use serialize as rustc_serialize;
 
 use serialize::{Encodable, Decodable};
 use serialize::json;
 
-#[derive(Encodable, Decodable)]
+#[derive(RustcEncodable, RustcDecodable)]
 struct A {
     foo: Box<[bool]>,
 }

src/test/run-pass-fulldeps/deriving-encodable-decodable-cell-refcell.rs

@@ -8,24 +8,26 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![allow(unused_imports)]
 // This briefly tests the capability of `Cell` and `RefCell` to implement the
 // `Encodable` and `Decodable` traits via `#[derive(Encodable, Decodable)]`
 
 
 #![feature(rustc_private)]
 
 extern crate serialize;
+use serialize as rustc_serialize;
 
 use std::cell::{Cell, RefCell};
 use serialize::{Encodable, Decodable};
 use serialize::json;
 
-#[derive(Encodable, Decodable)]
+#[derive(RustcEncodable, RustcDecodable)]
 struct A {
     baz: isize
 }
 
-#[derive(Encodable, Decodable)]
+#[derive(RustcEncodable, RustcDecodable)]
 struct B {
     foo: Cell<bool>,
     bar: RefCell<A>,

src/test/run-pass-fulldeps/deriving-global.rs

@@ -11,6 +11,7 @@
 #![feature(rustc_private)]
 
 extern crate serialize;
+use serialize as rustc_serialize;
 
 mod submod {
     // if any of these are implemented without global calls for any
@@ -20,21 +21,21 @@ mod submod {
                Hash,
                Clone,
                Debug,
-               Encodable, Decodable)]
+               RustcEncodable, RustcDecodable)]
     enum A { A1(usize), A2(isize) }
 
     #[derive(PartialEq, PartialOrd, Eq, Ord,
                Hash,
                Clone,
                Debug,
-               Encodable, Decodable)]
+               RustcEncodable, RustcDecodable)]
     struct B { x: usize, y: isize }
 
     #[derive(PartialEq, PartialOrd, Eq, Ord,
                Hash,
                Clone,
                Debug,
-               Encodable, Decodable)]
+               RustcEncodable, RustcDecodable)]
     struct C(usize, isize);
 
 }

src/test/run-pass-fulldeps/deriving-hygiene.rs

@@ -8,8 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![allow(non_upper_case_globals)]
 #![feature(rustc_private)]
 extern crate serialize;
+use serialize as rustc_serialize;
 
 pub const other: u8 = 1;
 pub const f: u8 = 1;
@@ -18,7 +20,7 @@ pub const s: u8 = 1;
 pub const state: u8 = 1;
 pub const cmp: u8 = 1;
 
-#[derive(Ord,Eq,PartialOrd,PartialEq,Debug,Decodable,Encodable,Hash)]
+#[derive(Ord,Eq,PartialOrd,PartialEq,Debug,RustcDecodable,RustcEncodable,Hash)]
 struct Foo {}
 
 fn main() {

src/test/run-pass-fulldeps/dropck_tarena_sound_drop.rs

@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![allow(unknown_lints)]
 // Check that an arena (TypedArena) can carry elements whose drop
 // methods might access borrowed data, as long as the borrowed data
 // has lifetime that strictly outlives the arena itself.

src/test/run-pass-fulldeps/issue-11881.rs

@@ -8,10 +8,14 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![allow(unused_must_use)]
+#![allow(dead_code)]
+#![allow(unused_imports)]
 
 #![feature(rustc_private)]
 
 extern crate serialize;
+use serialize as rustc_serialize;
 
 use std::io::Cursor;
 use std::io::prelude::*;
@@ -22,12 +26,12 @@ use serialize::{Encodable, Encoder};
 use serialize::json;
 use serialize::opaque;
 
-#[derive(Encodable)]
+#[derive(RustcEncodable)]
 struct Foo {
     baz: bool,
 }
 
-#[derive(Encodable)]
+#[derive(RustcEncodable)]
 struct Bar {
     froboz: usize,
 }