Add a failed test and naive fix for issue 571

[chentsulin]

Added a failed case for issue 571.

I can confirm this test failed on my machine, but still can't figure out how to fix it.

[codecov[bot]]

Codecov Report

Merging #573 (33b2aee) into master (9f5998e) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #573   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines          105       105           
  Branches        24        24           
=========================================
  Hits           105       105           

[markerikson]

@chentsulin : can you clarify how that tweak to the types is intended to fix this issue?