update test suite

Author: RalfJung

Diff for: src/test/ui/consts/const-eval/ub-ref.rs

@@ -26,7 +26,7 @@ const REF_AS_USIZE: usize = unsafe { mem::transmute(&0) };
 const REF_AS_USIZE_SLICE: &[usize] = &[unsafe { mem::transmute(&0) }];
 //~^ ERROR it is undefined behavior to use this value
 
-const REF_AS_USIZE_BOX_SLICE: Box<[usize]> = unsafe { mem::transmute::<&[usize], _>(&[mem::transmute(&0)]) };
+const REF_AS_USIZE_BOX_SLICE: Box<[usize]> = unsafe { mem::transmute(&[&0] as &[_]) };
 //~^ ERROR it is undefined behavior to use this value
 
 const USIZE_AS_REF: &'static u8 = unsafe { mem::transmute(1337usize) };

Diff for: src/test/ui/consts/const-eval/ub-ref.stderr

@@ -49,8 +49,8 @@ LL | const REF_AS_USIZE_SLICE: &[usize] = &[unsafe { mem::transmute(&0) }];
 error[E0080]: it is undefined behavior to use this value
   --> $DIR/ub-ref.rs:29:1
    |
-LL | const REF_AS_USIZE_BOX_SLICE: Box<[usize]> = unsafe { mem::transmute::<&[usize], _>(&[mem::transmute(&0)]) };
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a pointer at .<deref>, but expected plain (non-pointer) bytes
+LL | const REF_AS_USIZE_BOX_SLICE: Box<[usize]> = unsafe { mem::transmute(&[&0] as &[_]) };
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered a pointer at .<deref>, but expected plain (non-pointer) bytes
    |
    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
 

Diff for: src/test/ui/consts/rfc-2203-const-array-repeat-exprs/fn-call-in-const.rs

@@ -1,7 +1,8 @@
 // run-pass
 
-#![allow(unused)]
+#![allow(unused, incomplete_features)]
 #![feature(const_in_array_repeat_expressions)]
+#![feature(inline_const)]
 
 // Some type that is not copyable.
 struct Bar;
@@ -16,8 +17,6 @@ const fn type_copy() -> u32 {
 
 const _: [u32; 2] = [type_copy(); 2];
 
-// This is allowed because all promotion contexts use the explicit rules for promotability when
-// inside an explicit const context.
-const _: [Option<Bar>; 2] = [type_no_copy(); 2];
+const _: [Option<Bar>; 2] = [const { type_no_copy() }; 2];
 
 fn main() {}