/usr/lib/ruby/vendor_ruby/active_support/json/encoders/regexp.rb is in ruby-activesupport-2.3 2.3.14-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | class Regexp
def to_json(options = nil) #:nodoc:
inspect
end
def as_json(options = nil) #:nodoc:
self
end
end
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