While playing in the snapshot 14w03a I placed a play pot and my game crashed. It happened in creative and in survival. It happened on all sorts of blocks. At first I thought maybe it was a one time thing but it keeps repeatedly happening.

Here is the Minecraft log for the crash:
[10:30:48] [Server thread/ERROR]: Encountered an unexpected exception
p: Exception ticking world
at net.minecraft.server.MinecraftServer.u(SourceFile:523) ~[14w03a.jar:?]
at net.minecraft.server.MinecraftServer.t(SourceFile:461) ~[14w03a.jar:?]
at bvt.t(SourceFile:123) ~[14w03a.jar:?]
at net.minecraft.server.MinecraftServer.run(SourceFile:377) [14w03a.jar:?]
at ls.run(SourceFile:647) [14w03a.jar:?]
Caused by: java.lang.IllegalArgumentException: Empty string not allowed
at ei.<init>(SourceFile:15) ~[14w03a.jar:?]
at dw.a(SourceFile:82) ~[14w03a.jar:?]
at apq.b(SourceFile:25) ~[14w03a.jar:?]
at apq.s(SourceFile:44) ~[14w03a.jar:?]
at na.a(SourceFile:165) ~[14w03a.jar:?]
at na.b(SourceFile:128) ~[14w03a.jar:?]
at mz.b(SourceFile:205) ~[14w03a.jar:?]
at nc.c(SourceFile:165) ~[14w03a.jar:?]
at net.minecraft.server.MinecraftServer.u(SourceFile:519) ~[14w03a.jar:?]
... 4 more
[10:30:48] [Server thread/ERROR]: This crash report has been saved to: C:\Users\Boys\AppData\Roaming\.minecraft\crash-reports\crash-2014-01-16_10.30.48-server.txt