---- Minecraft Crash Report ----
// Why did you do that?

Time: 09.07.18 11:34
Description: Ticking memory connection

java.lang.IllegalStateException: Not a JSON Object: null
	at com.google.gson.JsonElement.getAsJsonObject(JsonElement.java:90)
	at wk.a(SourceFile:82)
	at wk.<init>(SourceFile:48)
	at vl.a(SourceFile:923)
	at tb.<init>(SourceFile:162)
	at vl.g(SourceFile:443)
	at ua.b(SourceFile:113)
	at ua.X_(SourceFile:65)
	at hw.a(SourceFile:238)
	at tx.c(SourceFile:170)
	at net.minecraft.server.MinecraftServer.w(SourceFile:716)
	at net.minecraft.server.MinecraftServer.v(SourceFile:623)
	at dfa.v(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:525)
	at java.lang.Thread.run(Thread.java:748)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server thread
Stacktrace:
	at com.google.gson.JsonElement.getAsJsonObject(JsonElement.java:90)
	at wk.a(SourceFile:82)
	at wk.<init>(SourceFile:48)
	at vl.a(SourceFile:923)
	at tb.<init>(SourceFile:162)
	at vl.g(SourceFile:443)
	at ua.b(SourceFile:113)
	at ua.X_(SourceFile:65)
	at hw.a(SourceFile:238)

-- Ticking connection --
Details:
	Connection: hw@1742e0f2
Stacktrace:
	at tx.c(SourceFile:170)
	at net.minecraft.server.MinecraftServer.w(SourceFile:716)
	at net.minecraft.server.MinecraftServer.v(SourceFile:623)
	at dfa.v(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:525)
	at java.lang.Thread.run(Thread.java:748)

-- System Details --
Details:
	Minecraft Version: 1.13-pre6
	Operating System: Linux (amd64) version 4.14.15-1-ARCH
	Java Version: 1.8.0_172, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1321408624 bytes (1260 MB) / 1644167168 bytes (1568 MB) up to 2147483648 bytes (2048 MB)
	JVM Flags: 7 total; -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.