RSpec tests sometimes lead to memory access error on Windows

  1) Puppet::Util::Windows::Process when reading environment variables will ignore only keys or values with corrupt byte sequences

     Failure/Error: get_uint32(i * 2) == 0

     IndexError:

       Memory access offset=32 size=4 is out of bounds

     # ./lib/puppet/util/windows/api_types.rb:82:in `get_uint32'

     # ./lib/puppet/util/windows/api_types.rb:82:in `block in read_arbitrary_wide_string_up_to'

     # ./lib/puppet/util/windows/api_types.rb:81:in `each'

     # ./lib/puppet/util/windows/api_types.rb:81:in `find'

     # ./lib/puppet/util/windows/api_types.rb:81:in `read_arbitrary_wide_string_up_to'

     # ./lib/puppet/util/windows/process.rb:309:in `get_environment_strings'

     # ./lib/puppet/util.rb:77:in `clear_environment'

     # ./lib/puppet/test/test_helper.rb:202:in `after_each_test'

     # ./spec/spec_helper.rb:192:in `block (2 levels) in <top (required)>'

     # ./spec/spec_helper.rb:187:in `block (2 levels) in <top (required)>'

     # util/rspec_runner:44:in `run'