From d7a9f253a575bbc70943ddb181335e8529aa2dd5 Mon Sep 17 00:00:00 2001
From: Alfonso Subiotto Marques <alfonso.subiotto@polarsignals.com>
Date: Fri, 23 Jan 2026 09:46:14 +0100
Subject: [PATCH 1/2] fix[vortex-array]: fix filter of sliced list

Previously when filtering a list array, we could create a mask longer than the
sliced elements range, causing a "Filter mask length mismatch" panic.

Signed-off-by: Alfonso Subiotto Marques <alfonso.subiotto@polarsignals.com>
---
 vortex-array/src/arrays/list/tests.rs | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/vortex-array/src/arrays/list/tests.rs b/vortex-array/src/arrays/list/tests.rs
index 8b1f396ca62..e7ed7fed901 100644
--- a/vortex-array/src/arrays/list/tests.rs
+++ b/vortex-array/src/arrays/list/tests.rs
@@ -9,11 +9,16 @@ use vortex_dtype::DType;
 use vortex_dtype::Nullability;
 use vortex_dtype::PType::I32;
 use vortex_error::VortexExpect;
+use vortex_error::VortexResult;
 use vortex_mask::Mask;
 use vortex_scalar::Scalar;
 
 use super::*;
+use crate::Canonical;
 use crate::IntoArray;
+use crate::LEGACY_SESSION;
+use crate::VortexSessionExecute;
+use crate::arrays::FilterArray;
 use crate::arrays::ListVTable;
 use crate::arrays::PrimitiveArray;
 use crate::assert_arrays_eq;
@@ -905,3 +910,22 @@ fn test_recursive_compact_list_of_lists() {
         recursive.scalar_at(0).unwrap()
     );
 }
+
+#[test]
+fn test_filter_sliced_list_array() -> VortexResult<()> {
+    let list = ListArray::try_new(
+        buffer![0..50].into_array(),
+        buffer![0, 10, 20, 30, 40, 50].into_array(),
+        Validity::AllValid,
+    )?
+    .into_array()
+    .slice(2..5);
+
+    let mask = Mask::from(BitBuffer::from(vec![true, false, true]));
+    let filter_array = FilterArray::new(list, mask).into_array();
+    let mut ctx = LEGACY_SESSION.create_execution_ctx();
+    let result = filter_array.execute::<Canonical>(&mut ctx)?;
+
+    assert_eq!(result.len(), 2);
+    Ok(())
+}

From f626cc1be68bd23a65d89527f89eab9cf536ed85 Mon Sep 17 00:00:00 2001
From: Andrew Duffy <andrew@a10y.dev>
Date: Fri, 23 Jan 2026 16:08:03 -0500
Subject: [PATCH 2/2] rebase

Signed-off-by: Andrew Duffy <andrew@a10y.dev>
---
 vortex-array/src/arrays/list/tests.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vortex-array/src/arrays/list/tests.rs b/vortex-array/src/arrays/list/tests.rs
index e7ed7fed901..4ba3e1f2b27 100644
--- a/vortex-array/src/arrays/list/tests.rs
+++ b/vortex-array/src/arrays/list/tests.rs
@@ -919,7 +919,7 @@ fn test_filter_sliced_list_array() -> VortexResult<()> {
         Validity::AllValid,
     )?
     .into_array()
-    .slice(2..5);
+    .slice(2..5)?;
 
     let mask = Mask::from(BitBuffer::from(vec![true, false, true]));
     let filter_array = FilterArray::new(list, mask).into_array();