From a6fa7bf5b672fe91a1f02bc3c36a54c944077d5a Mon Sep 17 00:00:00 2001
From: Graham <gpe@openrs2.org>
Date: Sat, 27 Mar 2021 11:19:02 +0000
Subject: [PATCH] Throw exception before importing a cache if its master index
 is empty

Signed-off-by: Graham <gpe@openrs2.org>
---
 .../main/kotlin/org/openrs2/archive/cache/CacheImporter.kt    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/archive/src/main/kotlin/org/openrs2/archive/cache/CacheImporter.kt b/archive/src/main/kotlin/org/openrs2/archive/cache/CacheImporter.kt
index aca396da21..c961ac314f 100644
--- a/archive/src/main/kotlin/org/openrs2/archive/cache/CacheImporter.kt
+++ b/archive/src/main/kotlin/org/openrs2/archive/cache/CacheImporter.kt
@@ -101,6 +101,10 @@ public class CacheImporter @Inject constructor(
 
             // import master index
             val masterIndex = createMasterIndex(store)
+            if (masterIndex.index.entries.isEmpty()) {
+                throw IOException("Master index empty, cache probably corrupt")
+            }
+
             val masterIndexId = try {
                 addMasterIndex(connection, masterIndex)
             } finally {