From 5674ba2a49f285be2cac464fb17ad903999ca4ef Mon Sep 17 00:00:00 2001
From: Conrad Irwin <conrad.irwin@gmail.com>
Date: Mon, 29 Apr 2024 10:24:04 -0600
Subject: [PATCH] Validate buffer_id of anchors in is_valid (#11170)

Release Notes:

- Fixes diagnostic panic better (follow up from #11066)
---
 crates/text/src/anchor.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/crates/text/src/anchor.rs b/crates/text/src/anchor.rs
index ceec293727..3a1ab499fb 100644
--- a/crates/text/src/anchor.rs
+++ b/crates/text/src/anchor.rs
@@ -97,6 +97,8 @@ impl Anchor {
     pub fn is_valid(&self, buffer: &BufferSnapshot) -> bool {
         if *self == Anchor::MIN || *self == Anchor::MAX {
             true
+        } else if self.buffer_id != Some(buffer.remote_id) {
+            false
         } else {
             let fragment_id = buffer.fragment_id_for_anchor(self);
             let mut fragment_cursor = buffer.fragments.cursor::<(Option<&Locator>, usize)>();