From 2b5699117f223575a0567ff70a691bc737ef62f4 Mon Sep 17 00:00:00 2001
From: Anthony Eid <56899983+Anthony-Eid@users.noreply.github.com>
Date: Tue, 28 Oct 2025 04:08:02 -0400
Subject: [PATCH] editor: Fix calculate relative line number panic (#41352)

### Reproduction steps

1. Turn on relative line numbers
2. Start a debugging session and hit an active debug line
3. minimize Zed so the editor element with the active debug line has
zero visible rows

#### Before

https://github.com/user-attachments/assets/57cc7a4d-478d-481a-8b70-f14c879bd858
#### After

https://github.com/user-attachments/assets/19614104-f9aa-4b76-886b-1ad4a5985403

Release Notes:

- debugger: Fix a panic that could occur when minimizing Zed
---
 crates/editor/src/element.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/editor/src/element.rs b/crates/editor/src/element.rs
index d6e85631fd129fe1fb109bfaa639d245f0070f7d..fd4795f40ff3857e68a6c0a71c138bc737c4f90f 100644
--- a/crates/editor/src/element.rs
+++ b/crates/editor/src/element.rs
@@ -3181,7 +3181,7 @@ impl EditorElement {
             i += 1;
         }
         delta = 1;
-        i = head_idx.min(buffer_rows.len() as u32 - 1);
+        i = head_idx.min(buffer_rows.len().saturating_sub(1) as u32);
         while i > 0 && buffer_rows[i as usize].buffer_row.is_none() && !count_wrapped_lines {
             i -= 1;
         }