Dear Mojang, this is the crash report that was generated.

---- Minecraft Crash Report -------- Minecraft Crash Report ----// There are four lights!
Time: 18/09/2019 16:03Description: Tesselating block model
java.lang.IndexOutOfBoundsException: Index: 1, Size: 1 at java.util.ArrayList.rangeCheck(ArrayList.java:653) at java.util.ArrayList.get(ArrayList.java:429) at cxj.b(SourceFile:91) at cxe.a(SourceFile:306) at dps.a(SourceFile:134) at dps.b(SourceFile:76) at dps.a(SourceFile:47) at dpq.a(SourceFile:48) at dpd.a(SourceFile:1300) at dpa.a(SourceFile:691) at dpa.a(SourceFile:535) at daj.e(SourceFile:931) at daj.b(SourceFile:564) at net.minecraft.client.main.Main.main(SourceFile:199)

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
– Head --Thread: Render threadStacktrace: at java.util.ArrayList.rangeCheck(ArrayList.java:653) at java.util.ArrayList.get(ArrayList.java:429) at cxj.b(SourceFile:91) at cxe.a(SourceFile:306) at dps.a(SourceFile:134) at dps.b(SourceFile:76)
– Block model being tesselated --Details: Block: Block{minecraft:grass_block}[snowy=false] Block location: World: (97,72,108), Chunk: (at 1,4,12 in 6,6; contains blocks 96,0,96 to 111,255,111), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511) Using AO: trueStacktrace: at dps.a(SourceFile:47) at dpq.a(SourceFile:48) at dpd.a(SourceFile:1300) at dpa.a(SourceFile:691)
– Affected level --Details: All players: 1 total; [doo['Tuzkinity'/264, l='MpServer', x=93.70, y=69.00, z=109.91]] Chunk stats: Client Chunk Cache: 529, 356 Level dimension: minecraft:overworld Level name: MpServer Level seed: 8374684247563001411 Level generator: ID 00 - default, ver 1. Features enabled: false Level generator options: {} Level spawn location: World: (30,63,70), Chunk: (at 14,3,6 in 1,4; contains blocks 16,0,64 to 31,255,79), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511) Level time: 10487 game time, 10487 day time Level storage version: 0x00000 - Unknown? Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false) Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false Server brand: vanilla Server type: Integrated singleplayer serverStacktrace: at dme.a(SourceFile:423) at daj.c(SourceFile:1857) at daj.b(SourceFile:579) at net.minecraft.client.main.Main.main(SourceFile:199)
– System Details --Details: Minecraft Version: 19w38a Minecraft Version ID: 19w38a 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: 1054736224 bytes (1005 MB) / 1979711488 bytes (1888 MB) up to 2147483648 bytes (2048 MB) CPUs: 12 JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M Launched Version: 19w38a Backend library: LWJGL version 3.2.2 build 10 Backend API: AMD Radeon (TM) R9 390 Series GL version 4.6.13571 Compatibility Profile Context 19.8.2 26.20.13001.40003, ATI Technologies Inc. GL Caps: Using framebuffer using OpenGL 3.0 Using VBOs: Yes Is Modded: Probably not. Jar signature remains and client brand is untouched. Type: Client (map_client.txt) Resource Packs: vanilla Current Language: English (United Kingdom) CPU: 12x Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz