@everywhere using Module is failing #26805
Description
[joe@z1 julia]$ ./julia -p 2
_
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| | |_| | | | (_| | | Version 0.7.0-DEV.4881 (2018-04-13 22:09 UTC)
_/ |\__'_|_|_|\__'_| | Commit b6d81e3 (0 days old master)
|__/ | x86_64-redhat-linux
julia> using Distributed
julia> @everywhere using Colors
┌ Warning: Replacing module `Colors`
└ @ Base loading.jl:894
┌ Warning: Replacing module `Colors`
└ @ Base loading.jl:894
julia> @everywhere using Colors
From worker 2: WARNING: using Colors.Colors in module Main conflicts with an existing identifier.
From worker 3: WARNING: using Colors.Colors in module Main conflicts with an existing identifier.ERROR:
On worker 2:
importing Colors into Main conflicts with an existing identifier
eval at ./boot.jl:317
#124 at /home/src/julia.7/usr/share/julia/site/v0.7/Distributed/src/process_messages.jl:276
run_work_thunk at /home/src/julia.7/usr/share/julia/site/v0.7/Distributed/src/process_messages.jl:56
run_work_thunk at /home/src/julia.7/usr/share/julia/site/v0.7/Distributed/src/process_messages.jl:65
#110 at ./event.jl:92
#remotecall_wait#162(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::Function, ::Distributed.Worker, ::Module, ::Vararg{Any,N} where N) at /home/src/julia.7/usr/share/julia/site/v0.7/Distributed/src/remotecall.jl:407
remotecall_wait(::Function, ::Distributed.Worker, ::Module, ::Vararg{Any,N} where N) at /home/src/julia.7/usr/share/julia/site/v0.7/Distributed/src/remotecall.jl:398
#remotecall_wait#165(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::Function, ::Int64, ::Module, ::Vararg{Any,N} where N) at /home/src/julia.7/usr/share/julia/site/v0.7/Distributed/src/remotecall.jl:419
remotecall_wait(::Function, ::Int64, ::Module, ::Vararg{Any,N} where N) at /home/src/julia.7/usr/share/julia/site/v0.7/Distributed/src/remotecall.jl:419
(::getfield(Distributed, Symbol("##171#173")){Module,Expr})() at ./task.jl:343
...and 1 more exception(s).
Stacktrace:
[1] sync_end() at ./task.jl:295
[2] macro expansion at ./task.jl:311 [inlined]
[3] remotecall_eval(::Module, ::Array{Int64,1}, ::Expr) at /home/src/julia.7/usr/share/julia/site/v0.7/Distributed/src/macros.jl:192
[4] top-level scope at /home/src/julia.7/usr/share/julia/site/v0.7/Distributed/src/macros.jl:176
Similar to #19187 , but worse that it fails when using is encountered twice.