Paper/patches/server/0574-Throw-proper-exception-on-empty-JsonList-file.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mariell Hoversholm <proximyst@proximyst.com>
Date: Sun, 1 Nov 2020 16:43:11 +0100
Subject: [PATCH] Throw proper exception on empty JsonList file
diff --git a/src/main/java/net/minecraft/server/players/StoredUserList.java b/src/main/java/net/minecraft/server/players/StoredUserList.java
index 91899909abd83611ac63633fef701be542cf64bf..4fd709a550bf8da1e996894a1ca6b91206c31e9e 100644
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--- a/src/main/java/net/minecraft/server/players/StoredUserList.java
+++ b/src/main/java/net/minecraft/server/players/StoredUserList.java
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@@ -187,6 +187,7 @@ public abstract class StoredUserList<K, V extends StoredUserEntry<K>> {
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try {
JsonArray jsonarray = (JsonArray) StoredUserList.GSON.fromJson(bufferedreader, JsonArray.class);
+ com.google.common.base.Preconditions.checkState(jsonarray != null, "The file \"" + this.file.getName() + "\" is either empty or corrupt"); // Paper
this.map.clear();
Iterator iterator = jsonarray.iterator();