From 8df8cdf28dc3fe97af36639de3d3c03d4055a3c2 Mon Sep 17 00:00:00 2001
From: Greyson Parrelli <greyson@signal.org>
Date: Fri, 15 Aug 2025 11:44:13 -0400
Subject: [PATCH] Fix potential crash in notification message generation.

---
 .../securesms/notifications/v2/NotificationItem.kt          | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/notifications/v2/NotificationItem.kt b/app/src/main/java/org/thoughtcrime/securesms/notifications/v2/NotificationItem.kt
index a6b54a93bb..086105e87c 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/notifications/v2/NotificationItem.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/notifications/v2/NotificationItem.kt
@@ -178,7 +178,11 @@ sealed class NotificationItem(val threadRecipient: Recipient, protected val reco
 
     if (spoilerRanges?.isNotEmpty() == true) {
       for (spoiler in spoilerRanges) {
-        updatedText = updatedText.replaceRange(spoiler.start.coerceAtMost(updatedText.length - 1), (spoiler.start + spoiler.length).coerceAtMost(updatedText.length), "■■■■")
+        updatedText = updatedText.replaceRange(
+          startIndex = spoiler.start.coerceAtMost(updatedText.length - 1).coerceAtLeast(0),
+          endIndex = (spoiler.start + spoiler.length).coerceAtMost(updatedText.length).coerceAtLeast(0),
+          replacement = "■■■■"
+        )
       }
     }