Your bug report

#60641: 30.0.50; void-variable string-width error when C-x b is entered

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 60641@debbugs.gnu.org.

-- 
60641: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=60641
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