From d1991b33003a4294d6f5fcdb000844e7c4169be3 Mon Sep 17 00:00:00 2001
From: goodboy <goodboy_foss@protonmail.com>
Date: Fri, 30 Jan 2026 19:21:28 -0500
Subject: [PATCH] Guard against `None` chart in `ArrowEditor.remove()`

Add null check for `linked.chart` before calling
`.plotItem.removeItem()` to prevent `AttributeError` when chart
is `None`.

(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
---
 piker/ui/_editors.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/piker/ui/_editors.py b/piker/ui/_editors.py
index f8d3e68c..872ec910 100644
--- a/piker/ui/_editors.py
+++ b/piker/ui/_editors.py
@@ -174,7 +174,10 @@ class ArrowEditor(Struct):
             f'{arrow!r}\n'
         )
         for linked in self.godw.iter_linked():
-            linked.chart.plotItem.removeItem(arrow)
+            if not (chart := linked.chart):
+                continue
+
+            chart.plotItem.removeItem(arrow)
         try:
             arrows.remove(arrow)
         except ValueError: