From eb2ff391ce87da60e65aa5964cfdcd95e7752cc4 Mon Sep 17 00:00:00 2001
From: melkor <hohav@fastmail.com>
Date: Thu, 14 Jul 2022 08:29:58 -0700
Subject: [PATCH] Added assertion

---
 src/array/fixed_size_list/mutable.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/array/fixed_size_list/mutable.rs b/src/array/fixed_size_list/mutable.rs
index c72bd012cf3..b51f02f58c4 100644
--- a/src/array/fixed_size_list/mutable.rs
+++ b/src/array/fixed_size_list/mutable.rs
@@ -47,6 +47,10 @@ impl<M: MutableArray> MutableFixedSizeListArray<M> {
     /// Creates a new [`MutableFixedSizeListArray`] from a [`MutableArray`], [`DataType`] and size.
     pub fn new_from(values: M, data_type: DataType, size: usize) -> Self {
         assert_eq!(values.len(), 0);
+        match data_type {
+            DataType::FixedSizeList(..) => {},
+            _ => panic!("data type must be FixedSizeList (got {:?})", data_type),
+        };
         Self {
             size,
             data_type,