When I try to create any sort of superflat world it crashes the client and displays the following message in the launcher:
A fatal error has been detected by the Java Runtime Environment:
#EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffef885628c, pid=16008, tid=8936
#JRE version: Java(TM) SE Runtime Environment (8.0_25-b18) (build 1.8.0_25-b18)
Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode windows-amd64 compressed oops)
Problematic frame:
C [ig75icd64.dll+0x55628c]
#Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-32606. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.