[MC-133986] Non [a-z0-9/._-] character in path of location: minecraft:EntityHorse

Dinnerbone's statement:

"That happens with corrupted chunks, possibly you went back and forth in an old version or there was a bug in an old versions upgrade, or you spawned it in incorrectly and it never caught it before. Ultimately it was corrupt before 1.13 saw it and now we don't know what to do with it."

"Now there's actually checks that the world makes sense and it catches lots of old corruptions, for better or worse"

1.13: crash-2018-07-18_20.44.51-server.txt

---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 18/07/18 20:44
Description: Ticking memory connection

i: Non [a-z0-9/._-] character in path of location: minecraft:EntityHorse
	at pc.<init>(SourceFile:38)
	at pc.<init>(SourceFile:43)
	at wn.a(SourceFile:121)
	at wn.a(SourceFile:100)
	at wn.<init>(SourceFile:48)
	at vo.a(SourceFile:915)
	at te.<init>(SourceFile:159)
	at vo.g(SourceFile:442)
	at ud.b(SourceFile:113)
	at ud.Y_(SourceFile:65)
	at hw.a(SourceFile:238)
	at ua.c(SourceFile:171)
	at net.minecraft.server.MinecraftServer.w(SourceFile:749)
	at net.minecraft.server.MinecraftServer.v(SourceFile:656)
	at dfx.v(SourceFile:157)
	at net.minecraft.server.MinecraftServer.run(SourceFile:559)
	at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Thread: Server thread
Stacktrace:
	at pc.<init>(SourceFile:38)
	at pc.<init>(SourceFile:43)
	at wn.a(SourceFile:121)
	at wn.a(SourceFile:100)
	at wn.<init>(SourceFile:48)
	at vo.a(SourceFile:915)
	at te.<init>(SourceFile:159)
	at vo.g(SourceFile:442)
	at ud.b(SourceFile:113)
	at ud.Y_(SourceFile:65)
	at hw.a(SourceFile:238)

-- Ticking connection --
Details:
	Connection: hw@67e7a7a4
Stacktrace:
	at ua.c(SourceFile:171)
	at net.minecraft.server.MinecraftServer.w(SourceFile:749)
	at net.minecraft.server.MinecraftServer.v(SourceFile:656)
	at dfx.v(SourceFile:157)
	at net.minecraft.server.MinecraftServer.run(SourceFile:559)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 1.13
	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: 171154128 bytes (163 MB) / 570425344 bytes (544 MB) up to 1073741824 bytes (1024 MB)
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	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.