$ ./test
The following parameter was passed in the call to DateTime::Format::Builder::Parser::create_single_parser but was not listed in the validation options: params
 at /</home/momo/test>DateTime/Format/Builder/Parser.pm line 311
	DateTime::Format::Builder::Parser::create_single_parser(undef, 'params', 'ARRAY(0xa7b1440)', 'length', 'ARRAY(0xa7b3bf0)', 'postprocess', 'CODE(0xa7c3100)', 'regex', 'Regexp=SCALAR(0xa7b3e20)', ...) called at /</home/momo/test>DateTime/Format/Builder/Parser.pm line 501
	DateTime::Format::Builder::Parser::sort_parsers('DateTime::Format::Builder::Parser', 'HASH(0xa4f4650)', 'ARRAY(0xa4f3c10)') called at /</home/momo/test>DateTime/Format/Builder/Parser.pm line 397
	DateTime::Format::Builder::Parser::create_multiple_parsers('DateTime::Format::Builder::Parser', 'HASH(0xa4f4650)', 'HASH(0xa7b3e40)', 'HASH(0xa7b4450)', 'HASH(0xa7b9368)', 'HASH(0xa20b008)', 'HASH(0xa20b1c8)', 'HASH(0xa7d0870)', 'HASH(0xa7d0950)', ...) called at /</home/momo/test>DateTime/Format/Builder/Parser.pm line 600
	DateTime::Format::Builder::Parser::create_parser('DateTime::Format::Builder::Parser', 'ARRAY(0xa635f30)', 'ARRAY(0xa7b3a60)', 'HASH(0xa7b3e40)', 'HASH(0xa7b4450)', 'HASH(0xa7b9368)', 'HASH(0xa20b008)', 'HASH(0xa20b1c8)', 'HASH(0xa7d0870)', ...) called at /</home/momo/test>DateTime/Format/Builder.pm line 156
	DateTime::Format::Builder::create_parser('DateTime::Format::Builder', 'ARRAY(0xa80fab8)') called at /</home/momo/test>DateTime/Format/Builder.pm line 174
	DateTime::Format::Builder::create_end_parser('DateTime::Format::Builder', 'ARRAY(0xa80fab8)') called at /</home/momo/test>DateTime/Format/Builder.pm line 104
	DateTime::Format::Builder::create_class(undef, 'parsers', 'HASH(0xa51d450)') called at /</home/momo/test>DateTime/Format/Flexible.pm line 238
	eval '' called at perlapp line 810
	PerlApp::safe_eval() called at perlapp line 900
	PerlApp::my_require('DateTime/Format/Flexible.pm') called at test.pl line 105
	main::BEGIN() called at /</home/momo/test>DateTime/Format/Flexible.pm line 0
	eval {...} called at /</home/momo/test>DateTime/Format/Flexible.pm line 0
BEGIN failed--compilation aborted at test.pl line 105.

Line 105: use DateTime::Format::Flexible;