From 7c081e893960295bf81d71b889863fc3e4f62506 Mon Sep 17 00:00:00 2001
From: Andras Schmelczer <andras@schmelczer.dev>
Date: Sun, 13 Apr 2025 22:21:38 +0100
Subject: [PATCH] Fix out of bounds cursors in case of trailing delete

---
 .../reconcile/src/operation_transformation/edited_text.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/backend/reconcile/src/operation_transformation/edited_text.rs b/backend/reconcile/src/operation_transformation/edited_text.rs
index 0ef6c66e..0f136fe7 100644
--- a/backend/reconcile/src/operation_transformation/edited_text.rs
+++ b/backend/reconcile/src/operation_transformation/edited_text.rs
@@ -309,7 +309,13 @@ where
 
         let last_index = merged_operations
             .iter()
-            .last()
+            .filter(|operation| {
+                matches!(
+                    operation.operation,
+                    Operation::Insert { .. } | Operation::Equal { .. }
+                )
+            })
+            .next_back()
             .map_or(0, |op| op.operation.end_index());
 
         for cursor in left_cursors.chain(right_cursors) {