Catch some edge-case in heuristic_in_bin()

[mayer79]

See title

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a5f2fac) 97.39% compared to head (e58ce93) 97.39%.

❗ Current head e58ce93 differs from pull request most recent head 27a43d4. Consider uploading reports for the commit 27a43d4 to get more accurate results

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #126   +/-   ##
=======================================
  Coverage   97.39%   97.39%           
=======================================
  Files          12       12           
  Lines         844      844           
=======================================
  Hits          822      822           
  Misses         22       22           

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