[MC-64072] Servers Crash Bug

So alot of time using 14w30c on my vanilla server it crashes all the time, and doing the same thing in 1.7.9 so im going to set the crash bug logs here:

27.07 19:16:10 [Server] INFO at java.lang.Thread.run(Thread.java:745)
27.07 19:16:10 [Server] INFO at net.minecraft.server.MinecraftServer.run(SourceFile:445)
27.07 19:16:10 [Server] INFO at net.minecraft.server.MinecraftServer.x(SourceFile:529)
27.07 19:16:10 [Server] INFO at ph.y(SourceFile:303)
27.07 19:16:10 [Server] INFO at net.minecraft.server.MinecraftServer.y(SourceFile:623)
27.07 19:16:10 [Server] INFO at qu.c(SourceFile:147)
27.07 19:16:10 [Server] INFO at gp.a(SourceFile:187)
27.07 19:16:10 [Server] INFO at ri.c(SourceFile:54)
27.07 19:16:10 [Server] INFO at ri.b(SourceFile:96)
27.07 19:16:10 [Server] INFO at sf.a(SourceFile:131)
27.07 19:16:10 [Server] INFO at sf.c(SourceFile:276)
27.07 19:16:10 [Server] INFO at sf.a(SourceFile:224)
27.07 19:16:10 [Server] INFO at qi.a(SourceFile:263)
27.07 19:16:10 [Server] INFO at qi.a(SourceFile:231)
27.07 19:16:10 [Server] INFO at qj.<init>(SourceFile:39)
27.07 19:16:10 [Server] INFO at qk.c(SourceFile:85)
27.07 19:16:10 [Server] INFO at qk.e(SourceFile:133)
27.07 19:16:10 [Server] INFO at bet.a(SourceFile:83)
27.07 19:16:10 [Server] INFO at bet.a(SourceFile:95)
27.07 19:16:10 [Server] INFO at bet.a(SourceFile:333)
27.07 19:16:10 [Server] INFO at bed.a(SourceFile:641)
27.07 19:16:10 [Server] INFO at java.lang.Thread.dumpStack(Thread.java:1365)
27.07 19:16:10 [Server] INFO java.lang.Exception: Stack trace
27.07 19:16:10 [Server] [Server thread/WARN Wrong location! (-28, 7) should be (-27, 7), abn['Chicken'/23749, l='world', x=-432.08, y=84.00, z=112.91]