Encountered this on multiplayer when picking an item from the crafting book to see the recipe.
The game transitioned to "Saving world" followed by a crash report in the launcher:
Time: 6/15/18 8:35 PM
Description: Rendering screen
java.lang.NullPointerException: Rendering screen
at col$a.c(SourceFile:109)
at col.a(SourceFile:70)
at coo.a(SourceFile:306)
at cnm.a(SourceFile:83)
at cwe.a(SourceFile:796)
at cit.c(SourceFile:816)
at cit.a(SourceFile:379)
at net.minecraft.client.main.Main.main(SourceFile:144)Environment
-- System Details --
Details:
Minecraft Version: 1.13-pre2
Operating System: Linux (amd64) version 4.16.14-300.fc28.x86_64
Java Version: 1.8.0_171, Oracle Corporation
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 190774288 bytes (181 MB) / 494981120 bytes (472 MB) up to 4281597952 bytes (4083 MB)
JVM Flags: 5 total; -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
Launched Version: 1.13-pre2
LWJGL: 3.1.2 build 29
OpenGL: GeForce GTX 1050/PCIe/SSE2 GL version 4.6.0 NVIDIA 390.59, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported. 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 (US)
Profiler Position: N/A (disabled)
CPU: 8x Intel(R) Core(TM) i7-6700 CPU @ 3.40GHzLinked issues
duplicates 1
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