move mir_check_* to ui tests, add adjusted references

src/test/ui/nll/mir_check_cast_closure.stderr

@@ -0,0 +1,14 @@
+warning: not reporting region error due to nll
+  --> $DIR/mir_check_cast_closure.rs:18:5
+   |
+LL |     g
+   |     ^
+
+error: unsatisfied lifetime constraints
+  --> $DIR/mir_check_cast_closure.rs:16:28
+   |
+LL |     let g: fn(_, _) -> _ = |_x, y| y;
+   |                            ^^^^^^^^^ cast requires that `'b` must outlive `'a`
+
+error: aborting due to previous error
+

src/test/ui/nll/mir_check_cast_reify.rs

@@ -45,8 +45,8 @@ fn bar<'a>(x: &'a u32) -> &'static u32 {
     // as part of checking the `ReifyFnPointer`.
     let f: fn(_) -> _ = foo;
     //~^ WARNING not reporting region error due to nll
-    //~| ERROR unsatisfied lifetime constraints
     f(x)
+    //~^ ERROR
 }
 
 fn main() {}

src/test/ui/nll/mir_check_cast_reify.stderr

@@ -0,0 +1,17 @@
+warning: not reporting region error due to nll
+  --> $DIR/mir_check_cast_reify.rs:46:25
+   |
+LL |     let f: fn(_) -> _ = foo;
+   |                         ^^^
+
+error: borrowed data escapes outside of closure
+  --> $DIR/mir_check_cast_reify.rs:48:5
+   |
+LL | fn bar<'a>(x: &'a u32) -> &'static u32 {
+   |            - `x` is a reference that is only valid in the closure body
+...
+LL |     f(x)
+   |     ^^^^ `x` escapes the closure body here
+
+error: aborting due to previous error
+

src/test/ui/nll/mir_check_cast_unsafe_fn.rs

@@ -17,8 +17,8 @@ fn bar<'a>(input: &'a u32, f: fn(&'a u32) -> &'a u32) -> &'static u32 {
     // in `g`. These are related via the `UnsafeFnPointer` cast.
     let g: unsafe fn(_) -> _ = f;
     //~^ WARNING not reporting region error due to nll
-    //~| ERROR unsatisfied lifetime constraints
     unsafe { g(input) }
+    //~^ ERROR
 }
 
 fn main() {}

src/test/ui/nll/mir_check_cast_unsafe_fn.stderr

@@ -0,0 +1,17 @@
+warning: not reporting region error due to nll
+  --> $DIR/mir_check_cast_unsafe_fn.rs:18:32
+   |
+LL |     let g: unsafe fn(_) -> _ = f;
+   |                                ^
+
+error: borrowed data escapes outside of closure
+  --> $DIR/mir_check_cast_unsafe_fn.rs:20:14
+   |
+LL | fn bar<'a>(input: &'a u32, f: fn(&'a u32) -> &'a u32) -> &'static u32 {
+   |            ----- `input` is a reference that is only valid in the closure body
+...
+LL |     unsafe { g(input) }
+   |              ^^^^^^^^ `input` escapes the closure body here
+
+error: aborting due to previous error
+

src/test/ui/nll/mir_check_cast_unsize.rs

@@ -15,7 +15,8 @@
 use std::fmt::Debug;
 
 fn bar<'a>(x: &'a u32) -> &'static dyn Debug {
-    x //~ ERROR unsatisfied lifetime constraints
+    //~^ ERROR unsatisfied lifetime constraints
+    x
     //~^ WARNING not reporting region error due to nll
 }
 

src/test/ui/nll/mir_check_cast_unsize.stderr

@@ -0,0 +1,19 @@
+warning: not reporting region error due to nll
+  --> $DIR/mir_check_cast_unsize.rs:19:5
+   |
+LL |     x
+   |     ^
+
+error: unsatisfied lifetime constraints
+  --> $DIR/mir_check_cast_unsize.rs:17:46
+   |
+LL |   fn bar<'a>(x: &'a u32) -> &'static dyn Debug {
+   |  ______________________________________________^
+LL | |     //~^ ERROR unsatisfied lifetime constraints
+LL | |     x
+LL | |     //~^ WARNING not reporting region error due to nll
+LL | | }
+   | |_^ return requires that `'a` must outlive `'static`
+
+error: aborting due to previous error
+