This method is deprecated or moved on the latest stable version.
The last existing version (v2.1.0) is shown here.
u_unpack(str)
protected
Unpack the string at codepoints boundaries
# File activesupport/lib/active_support/multibyte/handlers/utf8_handler.rb, line 381
def u_unpack(str)
begin
str.unpack 'U*'
rescue ArgumentError
raise EncodingError.new('malformed UTF-8 character')
end
end