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Handle small alphabets in Ruby 3.1 and 3.2 compatibility formatter #81

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Handle small alphabets in Ruby 3.1 and 3.2 compatibility formatter #81

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29bf249
Handle small alphabets on legacy Rubies
Aug 30, 2026
49c8f35
Reject singleton compatibility alphabets
OskarEichler Aug 30, 2026
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3 changes: 3 additions & 0 deletions lib/securerandom.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,9 @@ def bytes(n)
# Compatibility methods for Ruby 3.2, we can remove this after dropping to support Ruby 3.2
def alphanumeric(n = nil, chars: ALPHANUMERIC)
n = 16 if n.nil?
size = chars.size
raise ArgumentError, "character length must not be negative" if 0 > n
raise ArgumentError, "character source must contain at least two entries" if size < 2
choose(chars, n)
end if RUBY_VERSION < '3.3'

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