Split-off the passing tests to ensure they pass

Author: Nadrieril

Diff for: tests/ui/rfcs/rfc-0000-never_patterns/typeck.stderr renamed to tests/ui/rfcs/rfc-0000-never_patterns/typeck.fail.stderr

@@ -1,61 +1,61 @@
 error: mismatched types
-  --> $DIR/typeck.rs:21:9
+  --> $DIR/typeck.rs:25:9
    |
 LL |         !,
    |         ^ a never pattern must be used on an uninhabited type
    |
    = note: the matched value is of type `()`
 
 error: mismatched types
-  --> $DIR/typeck.rs:25:9
+  --> $DIR/typeck.rs:29:9
    |
 LL |         !,
    |         ^ a never pattern must be used on an uninhabited type
    |
    = note: the matched value is of type `(i32, bool)`
 
 error: mismatched types
-  --> $DIR/typeck.rs:29:13
+  --> $DIR/typeck.rs:33:13
    |
 LL |         (_, !),
    |             ^ a never pattern must be used on an uninhabited type
    |
    = note: the matched value is of type `bool`
 
 error: mismatched types
-  --> $DIR/typeck.rs:34:14
+  --> $DIR/typeck.rs:38:14
    |
 LL |         Some(!),
    |              ^ a never pattern must be used on an uninhabited type
    |
    = note: the matched value is of type `i32`
 
 error: mismatched types
-  --> $DIR/typeck.rs:41:9
+  --> $DIR/typeck.rs:45:9
    |
 LL |         !,
    |         ^ a never pattern must be used on an uninhabited type
    |
    = note: the matched value is of type `()`
 
 error: mismatched types
-  --> $DIR/typeck.rs:48:9
+  --> $DIR/typeck.rs:52:9
    |
 LL |         !,
    |         ^ a never pattern must be used on an uninhabited type
    |
    = note: the matched value is of type `Option<Void>`
 
 error: mismatched types
-  --> $DIR/typeck.rs:53:9
+  --> $DIR/typeck.rs:57:9
    |
 LL |         !,
    |         ^ a never pattern must be used on an uninhabited type
    |
    = note: the matched value is of type `[Void]`
 
 error: mismatched types
-  --> $DIR/typeck.rs:59:9
+  --> $DIR/typeck.rs:63:9
    |
 LL |         !,
    |         ^ a never pattern must be used on an uninhabited type

Diff for: tests/ui/rfcs/rfc-0000-never_patterns/typeck.rs

@@ -1,3 +1,6 @@
+// revisions: pass fail
+//[pass] check-pass
+//[fail] check-fail
 #![feature(never_patterns)]
 #![feature(exhaustive_patterns)]
 #![allow(incomplete_features)]
@@ -15,51 +18,55 @@ fn safe_unwrap_result<T: Copy>(res: Result<T, Void>) {
 }
 
 // Check we only accept `!` where we want to.
-fn never_pattern_typeck(void: Void) {
+#[cfg(fail)]
+fn never_pattern_typeck_fail(void: Void) {
     // Don't accept on a non-empty type.
     match () {
         !,
-        //~^ ERROR: mismatched types
+        //[fail]~^ ERROR: mismatched types
     }
     match (0, false) {
         !,
-        //~^ ERROR: mismatched types
+        //[fail]~^ ERROR: mismatched types
     }
     match (0, false) {
         (_, !),
-        //~^ ERROR: mismatched types
+        //[fail]~^ ERROR: mismatched types
     }
     match Some(0) {
         None => {}
         Some(!),
-        //~^ ERROR: mismatched types
+        //[fail]~^ ERROR: mismatched types
     }
 
     // Don't accept on an arbitrary type, even if there are no more branches.
     match () {
         () => {}
         !,
-        //~^ ERROR: mismatched types
+        //[fail]~^ ERROR: mismatched types
     }
 
     // Don't accept even on an empty branch.
     match None::<Void> {
         None => {}
         !,
-        //~^ ERROR: mismatched types
+        //[fail]~^ ERROR: mismatched types
     }
     match (&[] as &[Void]) {
         [] => {}
         !,
-        //~^ ERROR: mismatched types
+        //[fail]~^ ERROR: mismatched types
     }
     // Let alone if the emptiness is behind a reference.
     match None::<&Void> {
         None => {}
         !,
-        //~^ ERROR: mismatched types
+        //[fail]~^ ERROR: mismatched types
     }
+}
 
+#[cfg(pass)]
+fn never_pattern_typeck_pass(void: Void) {
     // Participate in match ergonomics.
     match &void {
         !,