t/command/create.t fails on some systems with a YAML error:
# Failed test 'nothing on stderr'
# at t/command/create.t line 36.
# STDERR: YAML Warning: Duplicate map key '$class' found. Ignoring.
# Code: YAML_LOAD_WARN_DUPLICATE_KEY
# Line: 121
# Document: 1
# at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Mo.pm line 24.
# YAML::Mo::__ANON__('YAML::Loader=HASH(0x47349d8)', 'YAML_LOAD_WARN_DUPLICATE_KEY', '$class') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 373
# YAML::Loader::_parse_mapping('YAML::Loader=HASH(0x47349d8)', '') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 184
# YAML::Loader::_parse_node('YAML::Loader=HASH(0x47349d8)') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 370
# YAML::Loader::_parse_mapping('YAML::Loader=HASH(0x47349d8)', '') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 184
# YAML::Loader::_parse_node('YAML::Loader=HASH(0x47349d8)') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 110
# YAML::Loader::_parse('YAML::Loader=HASH(0x47349d8)') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 25
# YAML::Loader::load('YAML::Loader=HASH(0x47349d8)', '\x{a}### Generated by Statocles version 0.096\x{a}\x{a}# This is the site...') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML.pm line 45
# YAML::Load('\x{a}### Generated by Statocles version 0.096\x{a}\x{a}# This is the site...') called at /home/cpansand/.cpan/build/2019120516/Statocles-0.096-fPlLNH/blib/lib/Statocles/Command/create.pm line 165
# Statocles::Command::create::create_site('Statocles::Command::create=HASH(0x463b0b8)', 'ARRAY(0x4696f38)') called at /home/cpansand/.cpan/build/2019120516/Statocles-0.096-fPlLNH/blib/lib/Statocles/Command/create.pm line 12
# Statocles::Command::create::run('Statocles::Command::create=HASH(0x463b0b8)', 'example.com') called at /home/cpansand/.cpan/build/2019120516/Statocles-0.096-fPlLNH/blib/lib/Statocles.pm line 64
# Statocles::run('Statocles', 'create', 'example.com') called at t/command/create.t line 33
# main::__ANON__() called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Capture/Tiny.pm line 382
# eval {...} called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Capture/Tiny.pm line 382
# Capture::Tiny::_capture_tee(1, 1, 0, 0, 'CODE(0x1214580)') called at t/command/create.t line 33
# main::__ANON__() called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/Builder.pm line 334
# eval {...} called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/Builder.pm line 334
# Test::Builder::subtest('Test::Builder=HASH(0x3e697f8)', 'project site with file deploy', 'CODE(0x461db60)') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/More.pm line 809
# Test::More::subtest('project site with file deploy', 'CODE(0x461db60)') called at t/command/create.t line 68
# main::__ANON__() called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/Builder.pm line 334
# eval {...} called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/Builder.pm line 334
# Test::Builder::subtest('Test::Builder=HASH(0x3e697f8)', 'create a site', 'CODE(0x45e5528)') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/More.pm line 809
# Test::More::subtest('create a site', 'CODE(0x45e5528)') called at t/command/create.t line 248
YAML Warning: Duplicate map key '$class' found. Ignoring.
Code: YAML_LOAD_WARN_DUPLICATE_KEY
Line: 121
Document: 1
at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Mo.pm line 24.
YAML::Mo::__ANON__('YAML::Loader=HASH(0x48717d8)', 'YAML_LOAD_WARN_DUPLICATE_KEY', '$class') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 373
YAML::Loader::_parse_mapping('YAML::Loader=HASH(0x48717d8)', '') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 184
YAML::Loader::_parse_node('YAML::Loader=HASH(0x48717d8)') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 370
YAML::Loader::_parse_mapping('YAML::Loader=HASH(0x48717d8)', '') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 184
YAML::Loader::_parse_node('YAML::Loader=HASH(0x48717d8)') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 110
YAML::Loader::_parse('YAML::Loader=HASH(0x48717d8)') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML/Loader.pm line 25
YAML::Loader::load('YAML::Loader=HASH(0x48717d8)', '\x{a}### Generated by Statocles version 0.096\x{a}\x{a}# This is the site...') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/YAML.pm line 45
YAML::Load('\x{a}### Generated by Statocles version 0.096\x{a}\x{a}# This is the site...') called at t/command/create.t line 48
main::__ANON__() called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/Builder.pm line 334
eval {...} called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/Builder.pm line 334
Test::Builder::subtest('Test::Builder=HASH(0x3e697f8)', 'project site with file deploy', 'CODE(0x461db60)') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/More.pm line 809
Test::More::subtest('project site with file deploy', 'CODE(0x461db60)') called at t/command/create.t line 68
main::__ANON__() called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/Builder.pm line 334
eval {...} called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/Builder.pm line 334
Test::Builder::subtest('Test::Builder=HASH(0x3e697f8)', 'create a site', 'CODE(0x45e5528)') called at /opt/perl-5.18.4/lib/site_perl/5.18.4/Test/More.pm line 809
Test::More::subtest('create a site', 'CODE(0x45e5528)') called at t/command/create.t line 248
# Looks like you failed 1 test of 12.
# Failed test 'project site with file deploy'
# at t/command/create.t line 68.
... (etc) ...
t/command/create.t fails on some systems with a YAML error: