From 1b0accd69fecaf24b928d9593aa1e046069786f8 Mon Sep 17 00:00:00 2001
From: Sergey Shanshin <sergey.shanshin@jetbrains.com>
Date: Mon, 25 Nov 2024 17:06:47 +0300
Subject: [PATCH] Fixed keeping INSTANCE field and serializer function for
 serializable objects in R8 full mode (#2865)

Details https://issuetracker.google.com/issues/379996140

Fixes #2861
---
 rules/r8.pro | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/rules/r8.pro b/rules/r8.pro
index ad5dd305cc..879917c118 100644
--- a/rules/r8.pro
+++ b/rules/r8.pro
@@ -10,3 +10,16 @@
 
  -if @kotlinx.serialization.Serializable class **
  -keep, allowshrinking, allowoptimization, allowobfuscation, allowaccessmodification class <1>
+
+
+# Rule to save INSTANCE field and serializer function for Kotlin serializable objects.
+#
+# R8 full mode works differently if the instance is not explicitly accessed in the code.
+#
+# see https://github.com/Kotlin/kotlinx.serialization/issues/2861
+# see https://issuetracker.google.com/issues/379996140
+
+-keepclassmembers @kotlinx.serialization.Serializable class ** {
+    public static ** INSTANCE;
+    kotlinx.serialization.KSerializer serializer(...);
+}