Rollup merge of rust-lang#154331 - cyrgani:incomplete-3, r=JonathanBrouwer

allow `incomplete_features` in all ui tests

This PR allows the `incomplete_features` lint for the `specialization` directory, thereby allowing it for all UI tests.

Followup to rust-lang#154174 and rust-lang#154276.
Closes rust-lang#154168.

Author: JonathanBrouwer

src/tools/compiletest/src/runtest.rs

@@ -1921,10 +1921,7 @@ impl<'test> TestCx<'test> {
 
         // Allow tests to use internal and incomplete features.
         compiler.args(&["-A", "internal_features"]);
-        // FIXME(#154168); temporarily exclude some directories to make the transition easier
-        if !input_file.iter().any(|p| p == "specialization") {
-            compiler.args(&["-A", "incomplete_features"]);
-        }
+        compiler.args(&["-A", "incomplete_features"]);
 
         // Allow tests to have unused parens and braces.
         // Add #![deny(unused_parens, unused_braces)] to the test file if you want to

tests/ui/specialization/assoc-ty-graph-cycle.rs

@@ -2,7 +2,7 @@
 
 // Make sure we don't crash with a cycle error during coherence.
 
-#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
+#![feature(specialization)]
 
 trait Trait<T> {
     type Assoc;

tests/ui/specialization/assoc-ty-graph-cycle.stderr

@@ -1,5 +1,5 @@
 // regression test for #118987
-#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
+#![feature(specialization)]
 
 trait Assoc {
     type Output;

tests/ui/specialization/coherence/default-impl-normalization-ambig-2.rs

@@ -1,13 +1,3 @@
-warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/default-impl-normalization-ambig-2.rs:2:12
-   |
-LL | #![feature(specialization)]
-   |            ^^^^^^^^^^^^^^
-   |
-   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
-   = help: consider using `min_specialization` instead, which is more stable and complete
-   = note: `#[warn(incomplete_features)]` on by default
-
 error[E0277]: the trait bound `u16: Assoc` is not satisfied
   --> $DIR/default-impl-normalization-ambig-2.rs:17:14
    |
@@ -20,6 +10,6 @@ help: the trait `Assoc` is implemented for `u8`
 LL | impl Assoc for u8 {}
    | ^^^^^^^^^^^^^^^^^
 
-error: aborting due to 1 previous error; 1 warning emitted
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0277`.

tests/ui/specialization/coherence/default-impl-normalization-ambig-2.stderr

@@ -1,5 +1,5 @@
 // regression test for #73299.
-#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
+#![feature(specialization)]
 
 trait X {
     type U;

tests/ui/specialization/coherence/default-item-normalization-ambig-1.rs

@@ -1,13 +1,3 @@
-warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/default-item-normalization-ambig-1.rs:2:12
-   |
-LL | #![feature(specialization)]
-   |            ^^^^^^^^^^^^^^
-   |
-   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
-   = help: consider using `min_specialization` instead, which is more stable and complete
-   = note: `#[warn(incomplete_features)]` on by default
-
 error[E0119]: conflicting implementations of trait `Y` for type `<() as X>::U`
   --> $DIR/default-item-normalization-ambig-1.rs:20:1
    |
@@ -16,6 +6,6 @@ LL | impl Y for <() as X>::U {}
 LL | impl Y for <i32 as X>::U {}
    | ^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `<() as X>::U`
 
-error: aborting due to 1 previous error; 1 warning emitted
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0119`.

tests/ui/specialization/coherence/default-item-normalization-ambig-1.stderr

@@ -2,7 +2,7 @@
 
 //@ aux-build:cross_crates_defaults.rs
 
-#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
+#![feature(specialization)]
 
 extern crate cross_crates_defaults;
 

tests/ui/specialization/cross-crate-defaults.rs

@@ -1,7 +1,6 @@
 //! Regression test for revealing associated types through specialization during const eval.
 //@ check-pass
 #![feature(specialization)]
-//~^ WARNING the feature `specialization` is incomplete and may not be safe to use
 
 trait Foo {
     const ASSOC: usize;