Segfault with --track-allocation on Windows

[davidanthoff]

This is on julia 0.5.2 and on the current julia 0.6 release candidate. I have a file named test3.jl with this content:

using CSV
           
file = "data.csv"      # make sure some file like that exists

io = open(file, "r")

csv = CSV.Source(io, delim = ';')

Data.close!(csv)
close(io)

quit()

When I execute this command line: julia --track-allocation=user .\test3.jl, I get a very long segfault output (multiple screens).

I also tried running the same code interactive, and in that case calling quit() throws an error at the end:

julia> quit()
ERROR: ReadOnlyMemoryError()
 in quit() at .\initdefs.jl:23

CCing @quinnj, although I feel that no matter what the CSV.jl package is doing, this shouldn't segfault.

[musm]

BTW I was seeing something similar yesterday with --code-coverage that also segfaulted on rc1-0.6
https://github.com/JuliaCI/Coverage.jl/pull/127/files

[yuyichao]

Dup of #21289