PaperMC/Spigot-Server-Patches/0681-Throw-proper-exception-on-empty-JsonList-file.patch

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/JsonList.java b/src/main/java/net/minecraft/server/players/JsonList.java
index cd35b833d3047a38be980ee550641e87bd3b9b01..c960852dc60d0598012c5eef0d139fe38bde63fb 100644
--- a/src/main/java/net/minecraft/server/players/JsonList.java
+++ b/src/main/java/net/minecraft/server/players/JsonList.java
@@ -189,6 +189,7 @@ public abstract class JsonList<K, V extends JsonListEntry<K>> {
 
             try {
                 JsonArray jsonarray = (JsonArray) JsonList.b.fromJson(bufferedreader, JsonArray.class);
+                com.google.common.base.Preconditions.checkState(jsonarray != null, "The file \"" + this.c.getName() + "\" is either empty or corrupt"); // Paper
 
                 this.d.clear();
                 Iterator iterator = jsonarray.iterator();