From ac1b1973369e67b15a2e3f9a1e1d9d6ba989a351 Mon Sep 17 00:00:00 2001
From: davotoula <david.kaspar@gmail.com>
Date: Thu, 23 Apr 2026 13:11:49 +0200
Subject: [PATCH] fix(proguard): keep no-arg constructor of Room *_Impl classes

R8 in playBenchmark (minifyEnabled) stripped the no-arg <init> from
WorkDatabase_Impl because -keepnames preserves names but not members.
Room instantiates generated *_Impl subclasses reflectively via
Class.getDeclaredConstructor(), so startup crashed with
NoSuchMethodException in androidx.startup.InitializationProvider.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 amethyst/proguard-rules.pro | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/amethyst/proguard-rules.pro b/amethyst/proguard-rules.pro
index 830dc4248..e730119cc 100644
--- a/amethyst/proguard-rules.pro
+++ b/amethyst/proguard-rules.pro
@@ -63,3 +63,9 @@
 -keep class com.vitorpamplona.quartz.** { *; }
 -keep class com.vitorpamplona.amethyst.** { *; }
 -keep class com.vitorpamplona.ammolite.** { *; }
+
+# Room generates *_Impl subclasses instantiated reflectively via no-arg constructor.
+# -keepnames preserves the name but R8 still strips the unused <init>().
+-keep class * extends androidx.room.RoomDatabase {
+    <init>();
+}