Using PyPlot breaks Pkg.add

[leotac]

Not sure if it should go here or in PyPlot.
Anyway, "using PyPlot" breaks Pkg.add().
Example:

using PyPlot
Pkg.add("Gadfly")

I get the error:

ERROR: `convert` has no method matching convert(::Type{UTF8String}, ::ASCIIString)
 in wait at task.jl:51
 in sync_end at ./task.jl:311
 in add at pkg/entry.jl:319
 in add at pkg/entry.jl:71
 in anonymous at pkg/dir.jl:28
 in cd at ./file.jl:20
 in __cd#230__ at ./pkg/dir.jl:28
 in add at pkg.jl:20

Same thing happens in 0.3.1 and in the nightly build.

[timholy]

This is presumably #8631. Until it's fixed, the only known workaround is to use julia 0.3 and Pkg.pin("Color",v"0.3.9"). We might have to fork Color into 0.3- and 0.4- branches just to avoid this problem (but currently Color is almost unusable on julia 0.4, so this isn't a great solution either). The bug seems to be present on julia 0.3 too (it's why you're getting this error), but at least it seems to be harder to trigger.

I'm going to close this, since there is nothing new here.