From a8cfb1a8658859b67259891f9a39a833a0653873 Mon Sep 17 00:00:00 2001
From: zjweiss <70495470+zjweiss@users.noreply.github.com>
Date: Fri, 3 Oct 2025 18:37:15 -0400
Subject: [PATCH] Call free on vecs and lens before returning a TypeError

Previously, this could cause some asan issues as these objects were not deleted.
---
 pandas/_libs/hashing.pyx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pandas/_libs/hashing.pyx b/pandas/_libs/hashing.pyx
index a1fd70529efa7..280cbe024b36f 100644
--- a/pandas/_libs/hashing.pyx
+++ b/pandas/_libs/hashing.pyx
@@ -91,6 +91,8 @@ def hash_object_array(
             hash(val)
             data = <bytes>str(val).encode(encoding)
         else:
+            free(vecs)
+            free(lens)
             raise TypeError(
                 f"{val} of type {type(val)} is not a valid type for hashing, "
                 "must be string or null"