fix infinite loop

[willmcgugan]

Fixes #1682

[codecov]

Codecov Report

Merging #1683 (8a74a97) into master (59d3511) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 8a74a97 differs from pull request most recent head 3645de6. Consider uploading reports for the commit 3645de6 to get more accurate results

@@           Coverage Diff           @@
##           master    #1683   +/-   ##
=======================================
  Coverage   99.69%   99.69%           
=======================================
  Files          71       71           
  Lines        6865     6867    +2     
=======================================
+ Hits         6844     6846    +2     
  Misses         21       21           

Flag	Coverage Δ
unittests	99.69% <100.00%> (+<0.01%)	⬆️

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Impacted Files	Coverage Δ
rich/cells.py	100.00% <100.00%> (ø)
rich/console.py	100.00% <100.00%> (ø)
rich/json.py	100.00% <100.00%> (ø)

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