[MC-40367] /tellraw @a throwing NPE when no players online

Command block on a timer runs "/tellraw @a <message>". When no players are online, here's what the console says:

[07:49:44] [Server thread/ERROR]: Couldn't process command
java.lang.NullPointerException
        at java.util.Collections.shuffle(Unknown Source) ~[?:1.7.0_45]
        at java.util.Collections.shuffle(Unknown Source) ~[?:1.7.0_45]
        at ad.c(SourceFile:127) ~[minecraft_server.1.7.2.jar:?]
        at ad.a(SourceFile:44) ~[minecraft_server.1.7.2.jar:?]
        at y.d(SourceFile:114) ~[minecraft_server.1.7.2.jar:?]
        at ba.b(SourceFile:35) ~[minecraft_server.1.7.2.jar:?]
        at z.a(SourceFile:58) [minecraft_server.1.7.2.jar:?]
        at afb.a(SourceFile:79) [minecraft_server.1.7.2.jar:?]
        at ain.a(SourceFile:49) [minecraft_server.1.7.2.jar:?]
        at mj.a(SourceFile:405) [minecraft_server.1.7.2.jar:?]
        at mj.b(SourceFile:134) [minecraft_server.1.7.2.jar:?]
        at net.minecraft.server.MinecraftServer.u(SourceFile:503) [minecraft_server.1.7.2.jar:?]
        at lj.u(SourceFile:265) [minecraft_server.1.7.2.jar:?]
        at net.minecraft.server.MinecraftServer.t(SourceFile:441) [minecraft_server.1.7.2.jar:?]
        at net.minecraft.server.MinecraftServer.run(SourceFile:358) [minecraft_server.1.7.2.jar:?]
        at ky.run(SourceFile:617) [minecraft_server.1.7.2.jar:?]