test that an override-sized array with same resolved size as another …

…override-sized array works

tests/tests/shader/array_size_overrides.rs

@@ -11,6 +11,13 @@ const SHADER: &str = r#"
     @group(0) @binding(0)
     var<storage, read_write> output: array<u32>;
 
+    // When `n` is overridden to 14 above, it will generate the type `array<u32, 14 - 2>` which
+    // already exists in the program because of variable declaration. Ensures naga does not panic
+    // when this happens.
+    //
+    // See https://github.com/gfx-rs/wgpu/issues/6722 for more info.
+    var<workgroup> testing: array<u32, 12>;
+
     @compute @workgroup_size(1) fn main() {
         // 1d spiral
         for (var i = 0; i < n - 2; i++) {