From f5407fa19a4f80b6593603e865377fe2c1759a5d Mon Sep 17 00:00:00 2001
From: Mikayla Maki <mikayla.c.maki@gmail.com>
Date: Wed, 19 Apr 2023 17:42:19 -0700
Subject: [PATCH] Fix underflow potential

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

diff --git a/crates/editor/src/editor.rs b/crates/editor/src/editor.rs
index 308f0079d0589215c9cd94d43b5302c3938f91a6..f5b322629a950c68202541720bb7a9ad60b1ddf9 100644
--- a/crates/editor/src/editor.rs
+++ b/crates/editor/src/editor.rs
@@ -1077,7 +1077,7 @@ impl CopilotState {
         match direction {
             Direction::Prev => {
                 self.active_completion_index = if self.active_completion_index == 0 {
-                    self.completions.len() - 1
+                    self.completions.len().saturating_sub(1)
                 } else {
                     self.active_completion_index - 1
                 };