/home/gem/gems/microformats-4.5.0/lib/microformats/time_property_parser.rb:59:in 'Microformats::TimePropertyParser#parse_element': undefined method 'value' for nil (NoMethodError)

              element.attribute('alt').value.strip
                                      ^^^^^^
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:21:in 'Microformats::ParserCore#parse_node'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:27:in 'block in Microformats::ParserCore#parse_nodeset'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:237:in 'block in Nokogiri::XML::NodeSet#each'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:236:in 'Integer#upto'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:236:in 'Nokogiri::XML::NodeSet#each'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:26:in 'Microformats::ParserCore#parse_nodeset'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:19:in 'Microformats::ParserCore#parse_node'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/time_property_parser.rb:49:in 'Microformats::TimePropertyParser#parse_value_class_pattern'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/time_property_parser.rb:15:in 'Microformats::TimePropertyParser#parse'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/property_parser.rb:61:in 'Microformats::PropertyParser#parse'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/format_parser.rb:101:in 'block in Microformats::FormatParser#parse_element'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/format_parser.rb:97:in 'Array#each'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/format_parser.rb:97:in 'Microformats::FormatParser#parse_element'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:21:in 'Microformats::ParserCore#parse_node'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:27:in 'block in Microformats::ParserCore#parse_nodeset'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:237:in 'block in Nokogiri::XML::NodeSet#each'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:236:in 'Integer#upto'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:236:in 'Nokogiri::XML::NodeSet#each'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:26:in 'Microformats::ParserCore#parse_nodeset'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:19:in 'Microformats::ParserCore#parse_node'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/format_parser.rb:19:in 'Microformats::FormatParser#parse'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser.rb:72:in 'Microformats::Parser#parse_element'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:21:in 'Microformats::ParserCore#parse_node'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:27:in 'block in Microformats::ParserCore#parse_nodeset'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:237:in 'block in Nokogiri::XML::NodeSet#each'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:236:in 'Integer#upto'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:236:in 'Nokogiri::XML::NodeSet#each'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:26:in 'Microformats::ParserCore#parse_nodeset'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser.rb:74:in 'Microformats::Parser#parse_element'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:21:in 'Microformats::ParserCore#parse_node'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:27:in 'block in Microformats::ParserCore#parse_nodeset'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:237:in 'block in Nokogiri::XML::NodeSet#each'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:236:in 'Integer#upto'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:236:in 'Nokogiri::XML::NodeSet#each'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:26:in 'Microformats::ParserCore#parse_nodeset'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser.rb:74:in 'Microformats::Parser#parse_element'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:21:in 'Microformats::ParserCore#parse_node'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:27:in 'block in Microformats::ParserCore#parse_nodeset'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:237:in 'block in Nokogiri::XML::NodeSet#each'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:236:in 'Integer#upto'
	from /home/gem/gems/nokogiri-1.19.3-x86_64-linux-musl/lib/nokogiri/xml/node_set.rb:236:in 'Nokogiri::XML::NodeSet#each'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:26:in 'Microformats::ParserCore#parse_nodeset'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:19:in 'Microformats::ParserCore#parse_node'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser_core.rb:17:in 'Microformats::ParserCore#parse_node'
	from /home/gem/gems/microformats-4.5.0/lib/microformats/parser.rb:37:in 'Microformats::Parser#parse'
	from /home/gem/gems/microformats-4.5.0/lib/microformats.rb:20:in 'Microformats.parse'
	from test-one.rb:17:in 'Object#process_html'
	from test-one.rb:24:in '<main>'