Add test of incompatible match arm types with multiline arm

Author: dtolnay

src/test/ui/match/match-incompat-type-semi.rs

@@ -39,4 +39,14 @@ fn main() {
         None => { //~ ERROR incompatible types
         },
     };
+
+    let _ = match Some(42) {
+        Some(x) => "rust-lang.org"
+            .chars()
+            .skip(1)
+            .chain(Some(x as u8 as char))
+            .take(10)
+            .any(char::is_alphanumeric),
+        None => {} //~ ERROR incompatible types
+    };
 }

src/test/ui/match/match-incompat-type-semi.stderr

@@ -69,6 +69,24 @@ LL | ||         },
 LL |  |     };
    |  |_____- `match` arms have incompatible types
 
-error: aborting due to 4 previous errors
+error[E0308]: `match` arms have incompatible types
+  --> $DIR/match-incompat-type-semi.rs:50:17
+   |
+LL |        let _ = match Some(42) {
+   |   _____________-
+LL |  |         Some(x) => "rust-lang.org"
+   |  |____________________-
+LL | ||             .chars()
+LL | ||             .skip(1)
+LL | ||             .chain(Some(x as u8 as char))
+LL | ||             .take(10)
+LL | ||             .any(char::is_alphanumeric),
+   | ||_______________________________________- this is found to be of type `bool`
+LL |  |         None => {}
+   |  |                 ^^ expected `bool`, found `()`
+LL |  |     };
+   |  |_____- `match` arms have incompatible types
+
+error: aborting due to 5 previous errors
 
 For more information about this error, try `rustc --explain E0308`.