refresh token test on Apple is broken

[samtkaplan]

See

AzStorage.jl/test/runtests.jl

Line 623 in 3c8f901

# TODO: CI is showing a seg-fault on Apple, but I do not have an Apple machine to help debug.

It seems that the seg-fault occurs here:

AzStorage.jl/test/runtests.jl

Line 647 in 3c8f901

r = @ccall libAzStorage.curl_writebytes_block_retry_threaded(_token::Ptr{UInt8}, refresh_token::Ptr{UInt8}, expiry::Ptr{Culong}, scope::Cstring, resource::Cstring, tenant::Cstring,

So, it might be worth checking on how things like the various tokens and expiries get refreshed, and if we are writing past the end of any array.