ClassCastException: cn.nukkit.block.BlockUnknown cannot be cast to cn.nukkit.block.BlockWall

[joserobjr]

🐞 I found a bug

📸 Screenshots / Videos

Not informed

▶ Steps to Reproduce

Not informed

✔ Expected Behavior

Process the backward compatibility without issues

❌ Actual Behavior

An error happens and the block becomes UPDATE!

📋 Debug information

• PowerNukkit version: 1.3.0.0-PN
• Debug link: Same as Server time out (not mob plugin) {Latest release version/powernukkit-1.3.0.0-PN.jar} #319
• Timings link (if relevant): N/A

💢 Crash Dump, Stack Trace and Other Files

2020-07-01 10:17:29.797 [main] ERROR - Throwing
java.lang.ClassCastException: cn.nukkit.block.BlockUnknown cannot be cast to cn.nukkit.block.BlockWall
	at cn.nukkit.level.format.generic.BaseChunk$WallUpdater.update(BaseChunk.java:425) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.level.format.generic.BaseChunk$GroupedUpdaters.update(BaseChunk.java:476) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.level.format.generic.BaseChunk.walk(BaseChunk.java:401) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.level.format.generic.BaseChunk.backwardCompatibilityUpdate(BaseChunk.java:48) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.level.Level.forceLoadChunk(Level.java:3003) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.level.Level.getChunk(Level.java:2647) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.level.Level.populateChunk(Level.java:3224) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.level.Level.populateChunk(Level.java:3215) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.Player.sendNextChunk(Player.java:823) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.Player.checkNetwork(Player.java:1906) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.Server.tick(Server.java:1193) ~[powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.Server.tickProcessor(Server.java:962) [powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.Server.start(Server.java:930) [powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.Server.<init>(Server.java:588) [powernukkit-1.3.0.0-PN.jar:?]
	at cn.nukkit.Nukkit.main(Nukkit.java:120) [powernukkit-1.3.0.0-PN.jar:?]
2020-07-01 10:17:29.841 [main] ERROR - Found an unknown BlockId:Meta combination: 139:48, replacing with an "UPDATE!" block.

💬 Anything else we should know?

From #319 logs