From b5a98a993faebc39033b0fdb24c3a57bdb19a657 Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Sun, 27 Oct 2019 20:58:43 +0000
Subject: [PATCH] lazy-init RuntimeBlockMapping

---
 .../mcpe/protocol/types/RuntimeBlockMapping.php    | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/pocketmine/network/mcpe/protocol/types/RuntimeBlockMapping.php b/src/pocketmine/network/mcpe/protocol/types/RuntimeBlockMapping.php
index 9ba73cbb4..606148d1b 100644
--- a/src/pocketmine/network/mcpe/protocol/types/RuntimeBlockMapping.php
+++ b/src/pocketmine/network/mcpe/protocol/types/RuntimeBlockMapping.php
@@ -40,8 +40,8 @@ final class RuntimeBlockMapping{
 	private static $legacyToRuntimeMap = [];
 	/** @var int[] */
 	private static $runtimeToLegacyMap = [];
-	/** @var mixed[] */
-	private static $bedrockKnownStates;
+	/** @var mixed[]|null */
+	private static $bedrockKnownStates = null;
 
 	private function __construct(){
 		//NOOP
@@ -77,6 +77,12 @@ final class RuntimeBlockMapping{
 		}
 	}
 
+	private static function lazyInit() : void{
+		if(self::$bedrockKnownStates === null){
+			self::init();
+		}
+	}
+
 	/**
 	 * Randomizes the order of the runtimeID table to prevent plugins relying on them.
 	 * Plugins shouldn't use this stuff anyway, but plugin devs have an irritating habit of ignoring what they
@@ -101,6 +107,7 @@ final class RuntimeBlockMapping{
 	 * @return int
 	 */
 	public static function toStaticRuntimeId(int $id, int $meta = 0) : int{
+		self::lazyInit();
 		/*
 		 * try id+meta first
 		 * if not found, try id+0 (strip meta)
@@ -115,6 +122,7 @@ final class RuntimeBlockMapping{
 	 * @return int[] [id, meta]
 	 */
 	public static function fromStaticRuntimeId(int $runtimeId) : array{
+		self::lazyInit();
 		$v = self::$runtimeToLegacyMap[$runtimeId];
 		return [$v >> 4, $v & 0xf];
 	}
@@ -128,7 +136,7 @@ final class RuntimeBlockMapping{
 	 * @return array
 	 */
 	public static function getBedrockKnownStates() : array{
+		self::lazyInit();
 		return self::$bedrockKnownStates;
 	}
 }
-RuntimeBlockMapping::init();