From f77e12ff2f3d8a9b28484e9ee8a8220c754a098f Mon Sep 17 00:00:00 2001
From: Saurabh <saurabh.raje@utah.edu>
Date: Fri, 22 Apr 2022 12:14:18 -0600
Subject: [PATCH] add checks to make sure access won't be out of bounds

---
 nalgebra-sparse/src/ops/serial/cs.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/nalgebra-sparse/src/ops/serial/cs.rs b/nalgebra-sparse/src/ops/serial/cs.rs
index f65b5071..cc13c168 100644
--- a/nalgebra-sparse/src/ops/serial/cs.rs
+++ b/nalgebra-sparse/src/ops/serial/cs.rs
@@ -30,6 +30,8 @@ pub fn spmm_cs_prealloc_unchecked<T>(
 where
     T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
+    assert_eq!(c.pattern().major_dim(), a.pattern().major_dim());
+    assert_eq!(c.pattern().minor_dim(), b.pattern().minor_dim());
     let some_val = Zero::zero();
     let mut scratchpad_values: Vec<T> = vec![some_val; b.pattern().minor_dim()];
     for i in 0..c.pattern().major_dim() {