From bee438bc53c1a67ef3f07d41c64d66a665df3ae6 Mon Sep 17 00:00:00 2001
From: Dave Pearson <davep@davep.org>
Date: Tue, 23 May 2023 11:30:04 +0100
Subject: [PATCH] Get the selection value tracker in place before calling the
 superclass

---
 src/textual/widgets/_selection_list.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/textual/widgets/_selection_list.py b/src/textual/widgets/_selection_list.py
index 6442d2d13..732e97409 100644
--- a/src/textual/widgets/_selection_list.py
+++ b/src/textual/widgets/_selection_list.py
@@ -207,6 +207,7 @@ class SelectionList(Generic[SelectionType], OptionList):
             classes: The CSS classes of the selection list.
             disabled: Whether the selection list is disabled or not.
         """
+        self._selected: dict[SelectionType, None] = {}
         super().__init__(
             *[self._make_selection(selection) for selection in selections],
             name=name,
@@ -214,7 +215,6 @@ class SelectionList(Generic[SelectionType], OptionList):
             classes=classes,
             disabled=disabled,
         )
-        self._selected: dict[SelectionType, None] = {}
 
     @property
     def selected(self) -> list[SelectionType]: