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comment#2 of #1835 added by siiky on Tue Apr 23 18:40:02 2024

(substring=? "" "" 0 0 0) results in a range error too. Sorry I forgot to update this ticket the other day.

I believe the problem is in the lines (##sys#check-range start1 0 (##sys#size s1) 'substring=?), when the string is empty -- it amounts to (##sys#check-range 0 0 0 'substring=?).

I can't tell what the obvious fix is, if there is one. Return #t if one of the strings is empty?
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Which egg provides `string-pad-right'?
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