What I expected to happen was...:
Correct world generation
What actually happened was...:
java.lang.RuntimeException: Already decorating
Steps to Reproduce:
1. Start local builtin server in creative mode
2. Fly around at a height > 255 in circles
3. Block generation and decoration will eventually fail
after several FPS drops (i.e. <1fps).
Tested on Windows 7 x64 with Java Server Edition: 1.7.0_51, an AMD FX 8350 CPU and an MSI GTX 770 GPU with updated drivers.
Environment
OS: Windows 7 (ver 6.1, arch amd64)
Java: 1.7.0_51 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.4.4 (bootstrap 5)
Minecraft: 14w25a (updated Wed Jun 18 08:52:28 PDT 2014)
This ticket has been marked as a duplicate of MC-58759, in favor of the more general or better information provided.