GenericIOBuffer assumes data is stored contiguously in memory

[nhz2]

julia/base/iobuffer.jl

Lines 184 to 194 in 4ecdc37

	function unsafe_read(from::GenericIOBuffer, p::Ptr{UInt8}, nb::UInt)
	from.readable || _throw_not_readable()
	avail = bytesavailable(from)
	adv = min(avail, nb)
	GC.@preserve from unsafe_copyto!(p, pointer(from.data, from.ptr), adv)
	from.ptr += adv
	if nb > avail
	throw(EOFError())
	end
	nothing
	end

This can lead to the following strange behavior:

julia> a = @view(collect(0x00:0x0f)[begin:2:end])
8-element view(::Vector{UInt8}, 1:2:15) with eltype UInt8:
 0x00
 0x02
 0x04
 0x06
 0x08
 0x0a
 0x0c
 0x0e

julia> b = read(IOBuffer(a))
8-element Vector{UInt8}:
 0x00
 0x01
 0x02
 0x03
 0x04
 0x05
 0x06
 0x07

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