Add some tests

src/test/ui/pattern/usefulness/slice-patterns-exhaustiveness.rs

@@ -5,6 +5,20 @@ fn main() {
     let s1: &[bool; 1] = &[false; 1];
     let s2: &[bool; 2] = &[false; 2];
     let s3: &[bool; 3] = &[false; 3];
+    let s10: &[bool; 10] = &[false; 10];
+
+    match s2 {
+    //~^ ERROR `&[false, _]` not covered
+        [true, .., true] => {}
+    }
+    match s3 {
+    //~^ ERROR `&[false, _, _]` not covered
+        [true, .., true] => {}
+    }
+    match s10 {
+    //~^ ERROR `&[false, _, _, _, _, _, _, _, _, _]` not covered
+        [true, .., true] => {}
+    }
 
     match s1 {
         [true, ..] => {}
@@ -27,10 +41,6 @@ fn main() {
         [.., false] => {}
     }
 
-    match s3 {
-    //~^ ERROR `&[false, _, _]` not covered
-        [true, .., true] => {}
-    }
     match s {
     //~^ ERROR `&[_, ..]` not covered
         [] => {}

src/test/ui/pattern/usefulness/slice-patterns-exhaustiveness.stderr

@@ -1,5 +1,29 @@
+error[E0004]: non-exhaustive patterns: `&[false, _]` not covered
+  --> $DIR/slice-patterns-exhaustiveness.rs:10:11
+   |
+LL |     match s2 {
+   |           ^^ pattern `&[false, _]` not covered
+   |
+   = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
+
+error[E0004]: non-exhaustive patterns: `&[false, _, _]` not covered
+  --> $DIR/slice-patterns-exhaustiveness.rs:14:11
+   |
+LL |     match s3 {
+   |           ^^ pattern `&[false, _, _]` not covered
+   |
+   = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
+
+error[E0004]: non-exhaustive patterns: `&[false, _, _, _, _, _, _, _, _, _]` not covered
+  --> $DIR/slice-patterns-exhaustiveness.rs:18:11
+   |
+LL |     match s10 {
+   |           ^^^ pattern `&[false, _, _, _, _, _, _, _, _, _]` not covered
+   |
+   = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
+
 error[E0004]: non-exhaustive patterns: `&[false, true]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:13:11
+  --> $DIR/slice-patterns-exhaustiveness.rs:27:11
    |
 LL |     match s2 {
    |           ^^ pattern `&[false, true]` not covered
@@ -7,7 +31,7 @@ LL |     match s2 {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `&[false, _, true]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:18:11
+  --> $DIR/slice-patterns-exhaustiveness.rs:32:11
    |
 LL |     match s3 {
    |           ^^ pattern `&[false, _, true]` not covered
@@ -15,23 +39,15 @@ LL |     match s3 {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `&[false, .., true]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:23:11
+  --> $DIR/slice-patterns-exhaustiveness.rs:37:11
    |
 LL |     match s {
    |           ^ pattern `&[false, .., true]` not covered
    |
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
-error[E0004]: non-exhaustive patterns: `&[false, _, _]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:30:11
-   |
-LL |     match s3 {
-   |           ^^ pattern `&[false, _, _]` not covered
-   |
-   = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
-
 error[E0004]: non-exhaustive patterns: `&[_, ..]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:34:11
+  --> $DIR/slice-patterns-exhaustiveness.rs:44:11
    |
 LL |     match s {
    |           ^ pattern `&[_, ..]` not covered
@@ -39,7 +55,7 @@ LL |     match s {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `&[_, _, ..]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:38:11
+  --> $DIR/slice-patterns-exhaustiveness.rs:48:11
    |
 LL |     match s {
    |           ^ pattern `&[_, _, ..]` not covered
@@ -47,7 +63,7 @@ LL |     match s {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `&[false, ..]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:43:11
+  --> $DIR/slice-patterns-exhaustiveness.rs:53:11
    |
 LL |     match s {
    |           ^ pattern `&[false, ..]` not covered
@@ -55,7 +71,7 @@ LL |     match s {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `&[false, _, ..]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:48:11
+  --> $DIR/slice-patterns-exhaustiveness.rs:58:11
    |
 LL |     match s {
    |           ^ pattern `&[false, _, ..]` not covered
@@ -63,7 +79,7 @@ LL |     match s {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `&[_, .., false]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:54:11
+  --> $DIR/slice-patterns-exhaustiveness.rs:64:11
    |
 LL |     match s {
    |           ^ pattern `&[_, .., false]` not covered
@@ -71,7 +87,7 @@ LL |     match s {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `&[_, _, .., true]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:61:11
+  --> $DIR/slice-patterns-exhaustiveness.rs:71:11
    |
 LL |     match s {
    |           ^ pattern `&[_, _, .., true]` not covered
@@ -79,13 +95,13 @@ LL |     match s {
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
 error[E0004]: non-exhaustive patterns: `&[true, _, .., _]` not covered
-  --> $DIR/slice-patterns-exhaustiveness.rs:68:11
+  --> $DIR/slice-patterns-exhaustiveness.rs:78:11
    |
 LL |     match s {
    |           ^ pattern `&[true, _, .., _]` not covered
    |
    = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
 
-error: aborting due to 11 previous errors
+error: aborting due to 13 previous errors
 
 For more information about this error, try `rustc --explain E0004`.