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It'd be really nice to be able to redirect stdout/err to an IOBuffer:
julia> b = IOBuffer()
IOBuffer(data=UInt8[...], readable=true, writable=true, seekable=true, append=false, size=0, maxsize=Inf, ptr=1, mark=-1)
julia> redirect_stdout(b)
ERROR: MethodError: `redirect_stdout` has no method matching redirect_stdout(::Base.AbstractIOBuffer{Array{UInt8,1}})
I thought I saw another similar issue the other day, but was unable to locate it.
(Aside/another issue it would be nice to write this as a do block.)