Add a test for tuple_array_conversion

Author: popzxc

tests/ui/tuple_array_conversions.rs

@@ -82,6 +82,11 @@ fn main() {
     [a, c];
     let [[a, b], [c, d]] = [[1, 2], [3, 4]];
     (a, c);
+    // Array length is not usize (#11144)
+    fn generic_array_length<const N: usize>() {
+        let src = [0; N];
+        let dest: (u8,) = (src[0],);
+    }
 }
 
 #[clippy::msrv = "1.70.0"]

tests/ui/tuple_array_conversions.stderr

@@ -64,15 +64,15 @@ LL |     (src, dest);
    = help: use `.into()` instead, or `<(T0, T1, ..., Tn)>::from` if type annotations are needed
 
 error: it looks like you're trying to convert an array to a tuple
-  --> $DIR/tuple_array_conversions.rs:99:13
+  --> $DIR/tuple_array_conversions.rs:104:13
    |
 LL |     let x = (x[0], x[1]);
    |             ^^^^^^^^^^^^
    |
    = help: use `.into()` instead, or `<(T0, T1, ..., Tn)>::from` if type annotations are needed
 
 error: it looks like you're trying to convert a tuple to an array
-  --> $DIR/tuple_array_conversions.rs:100:13
+  --> $DIR/tuple_array_conversions.rs:105:13
    |
 LL |     let x = [x.0, x.1];
    |             ^^^^^^^^^^