In a previous bug report I complained that you can not execute various commands
because the result won't output to the player chat.
Searge pointed it out "as intended" - hell knows why thats the case but never mind...

But you can not deny, that it is not a bug if you want to run the following command in a commandblock

execute @p ~ ~ ~ help

execute @p ~ ~ ~ help 2

If you do so, it won't output the help chat to the player.
the output of the commandblock you can see in the screenshots.
For the 1st command is says sth about "/effect" what doesn't make any sense
and for the 2nd command it just won't accept it.

This is no duplicate of MC-62352 even though I still can't understand why that should "work as intended"

But in this case this defenitely is a bug, as you can see by the error in the command block.
If you think that once again "this is working as intended" then ***** reconsider this please!

The command structure is "/execute <entity> <x> <y> <z> <command>"
and not /execute <entity> <x> <y> <z> <some random commands I think they might be ok, you won't need them anyway>"
So every! command should work with "execute" or this just useless bullcrap