From 18040ccd719791cb32de4e9561e406711f7a338d Mon Sep 17 00:00:00 2001
From: Brendan Hansknecht <brendan.hansknecht@gmail.com>
Date: Mon, 20 Nov 2023 19:49:08 -0800
Subject: [PATCH] fix indexing

---
 crates/compiler/exhaustive/src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/compiler/exhaustive/src/lib.rs b/crates/compiler/exhaustive/src/lib.rs
index 5239cb7258a..c4b36af2147 100644
--- a/crates/compiler/exhaustive/src/lib.rs
+++ b/crates/compiler/exhaustive/src/lib.rs
@@ -526,7 +526,7 @@ fn specialize_row_with_polymorphic_list(
     let (patterns_before, patterns_after) = match polymorphic_list_ctor {
         ListArity::Slice(before, after) => (
             &list_element_patterns[..before],
-            &list_element_patterns[after..],
+            &list_element_patterns[list_element_patterns.len() - after..],
         ),
         ListArity::Exact(_) => (list_element_patterns, &[] as &[Pattern]),
     };