---- Minecraft Crash Report ----
// There are four lights!

Time: 2020/3/7 上午 11:40
Description: Server dump

java.lang.Exception: dummy
	at net.minecraft.server.MinecraftServer.c(SourceFile:1672)
	at net.minecraft.server.MinecraftServer.a(SourceFile:1657)
	at to.c(SourceFile:92)
	at to.a(SourceFile:45)
	at to$$Lambda$2391/1297611793.run(Unknown Source)
	at com.mojang.brigadier.CommandDispatcher.execute(CommandDispatcher.java:262)
	at com.mojang.brigadier.CommandDispatcher.execute(CommandDispatcher.java:176)
	at cr.a(SourceFile:235)
	at xv.c(SourceFile:1083)
	at xv.a(SourceFile:1070)
	at pp.a(SourceFile:36)
	at pp.a(SourceFile:9)
	at lv.a(SourceFile:21)
	at lv$$Lambda$3306/1840847223.run(Unknown Source)
	at tb.run(SourceFile:18)
	at ais.c(SourceFile:144)
	at aiw.c(SourceFile:23)
	at net.minecraft.server.MinecraftServer.b(SourceFile:743)
	at net.minecraft.server.MinecraftServer.c(SourceFile:138)
	at ais.w(SourceFile:118)
	at net.minecraft.server.MinecraftServer.ba(SourceFile:725)
	at net.minecraft.server.MinecraftServer.w(SourceFile:719)
	at ais.c(SourceFile:127)
	at net.minecraft.server.MinecraftServer.v(SourceFile:704)
	at net.minecraft.server.MinecraftServer.run(SourceFile:659)
	at java.lang.Thread.run(Thread.java:745)


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

-- System Details --
Details:
	Minecraft Version: 1.15.2
	Minecraft Version ID: 1.15.2
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 539931784 bytes (514 MB) / 1342177280 bytes (1280 MB) up to 1342177280 bytes (1280 MB)
	CPUs: 8
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx1280M -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	Player Count: 1 / 8; [xe['flashteens'/35, l='MC-173510-Map', x=5981.72, y=100.71, z=-53.50]]
	Data Packs: vanilla, file/FTMC Speedometer (incompatible), file/PerformanceTestPack (incompatible)
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.