Starting a new superflat customized world with this preset: 3;7,3*1,52*24:2,31:1;21;
and a random seed, cheats on, structures off, bonus chest off, creative, I expected to start playing and after creating the world start playing.
The game crashes to Launcher ang gives a crash report.
The world was created successfully i thing, 'cause it is still in the list of Single Player Worlds, but each time i try to access again, crashes to launcher.
The steps to reproduce are the ones i just described.
Environment
OS: Windows 7 (ver 6.1, arch amd64)
Java: 1.8.0_25 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.6.11 (bootstrap 100)
Minecraft: 1.8.7 (updated Fri Jun 05 05:10:44 CDT 2015)
Not quite a duplicate of MC-32168, but if you place tall grass on sandstone, the tall grass drops in exponentially increasing numbers as soon as the world is loaded, then causing the stack overflow.