From 816eddc89d1e8b64e31a5a74cfa7ecf624de28da Mon Sep 17 00:00:00 2001
From: Brayan Oliveira <69634269+brayandso@users.noreply.github.com>
Date: Fri, 6 Dec 2024 16:04:33 -0300
Subject: [PATCH] fix: check if HeaderFragment is attached

parentFragmentManager may throw if not
---
 .../src/main/java/com/ichi2/anki/preferences/HeaderFragment.kt   | 1 +
 1 file changed, 1 insertion(+)

diff --git a/AnkiDroid/src/main/java/com/ichi2/anki/preferences/HeaderFragment.kt b/AnkiDroid/src/main/java/com/ichi2/anki/preferences/HeaderFragment.kt
index bc55a8adf8cf..8e47ab5197c0 100644
--- a/AnkiDroid/src/main/java/com/ichi2/anki/preferences/HeaderFragment.kt
+++ b/AnkiDroid/src/main/java/com/ichi2/anki/preferences/HeaderFragment.kt
@@ -71,6 +71,7 @@ class HeaderFragment : PreferenceFragmentCompat(), TitleProvider {
             }
 
             parentFragmentManager.addOnBackStackChangedListener {
+                if (!isAdded) return@addOnBackStackChangedListener
                 val fragment = parentFragmentManager.findFragmentById(R.id.settings_container)
                     ?: return@addOnBackStackChangedListener