From c998b4a053b2893e15b9d4cbb4ca57faf03e7108 Mon Sep 17 00:00:00 2001
From: Cole Miller <cole@zed.dev>
Date: Thu, 9 Apr 2026 10:05:40 -0400
Subject: [PATCH] diagnostics: Fall back to `multibuffer_context_lines` when
 syntactic expansion produces a single-line range (#53526)

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- N/A
---
 crates/diagnostics/src/diagnostics.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crates/diagnostics/src/diagnostics.rs b/crates/diagnostics/src/diagnostics.rs
index dc3708e9307032a43b062289764656fa05b20d46..49e17e69b00c6061c5209c5ad5440c7ea816dd80 100644
--- a/crates/diagnostics/src/diagnostics.rs
+++ b/crates/diagnostics/src/diagnostics.rs
@@ -989,6 +989,7 @@ async fn context_range_for_entry(
         cx,
     )
     .await
+    .filter(|rows| rows.start() != rows.end())
     {
         Range {
             start: Point::new(*rows.start(), 0),