fix: inconsistency inline constant handling for non‑fixed‑stride datatype

rust/lance-arrow/src/scalar.rs

@@ -176,7 +176,12 @@ pub fn try_inline_value(scalar: &ArrayRef) -> Option<Vec<u8>> {
     if data.buffers().len() != 1 {
         return None;
     }
+
+    let byte_width = data.data_type().byte_width_opt();
     let bytes = data.buffers()[0].as_slice();
+    if byte_width.is_none() || bytes.len() != byte_width.unwrap() {
+        return None;
+    }
     if bytes.len() > INLINE_VALUE_MAX_BYTES {
         return None;
     }

rust/lance-encoding/src/encodings/logical/primitive.rs

@@ -6313,6 +6313,33 @@ mod tests {
         check_round_trip_encoding_of_data(vec![arr], &test_cases, HashMap::new()).await;
     }
 
+    #[tokio::test]
+    async fn test_constant_layout_out_of_line_boolean_v2_2() {
+        use crate::format::pb21::page_layout::Layout;
+
+        let arr: ArrayRef = Arc::new(arrow_array::BooleanArray::from_iter(std::iter::repeat_n(
+            Some(true),
+            512,
+        )));
+        let field = arrow_schema::Field::new("c", DataType::Boolean, true);
+        let page = encode_first_page(field, arr.clone(), LanceFileVersion::V2_2).await;
+
+        let PageEncoding::Structural(layout) = &page.description else {
+            panic!("Expected structural encoding");
+        };
+        let Layout::ConstantLayout(layout) = layout.layout.as_ref().unwrap() else {
+            panic!("Expected constant layout in slot 2");
+        };
+        assert!(layout.inline_value.is_none());
+        assert_eq!(page.data.len(), 1);
+
+        let test_cases = TestCases::default()
+            .with_min_file_version(LanceFileVersion::V2_2)
+            .with_max_file_version(LanceFileVersion::V2_2)
+            .with_page_sizes(vec![4096]);
+        check_round_trip_encoding_of_data(vec![arr], &test_cases, HashMap::new()).await;
+    }
+
     #[tokio::test]
     async fn test_constant_layout_nullable_item_v2_2() {
         use crate::format::pb21::page_layout::Layout;