add devnull, stdin, stdout and stderr

[fredrikekre]

No description provided.

[fredrikekre]

Hmm... This will not work because some functions changes Base.stdout but Compat.stdout will always point to the old one. See e.g. the test failure on 0.6.

[stevengj]

Yes, it needs to be done with @compat to rewrite at the source level, I think.

[yuyichao]

Not necessarily.

julia> module A
       a = 1
       end
Main.A

julia> module B
       import ..A.a
       end
Main.B

julia> B.a
1

julia> A.a
1

julia> A.eval(:(a = 2))
2

julia> B.a
2

julia> A.a
2

[yuyichao]

Actually nvm, I guess this doesn't work for renaming...