Try harder not to hang in referrer.t

[oalders]

Code changes courtesy of GitHub Copilot

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.69%. Comparing base (1fc139f) to head (6247522).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #392   +/-   ##
=======================================
  Coverage   89.69%   89.69%           
=======================================
  Files           3        3           
  Lines         854      854           
  Branches      224      224           
=======================================
  Hits          766      766           
  Misses         37       37           
  Partials       51       51           

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