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Published 20 hours ago • verified publisher icon ruby

Adding psych causes CircleCI to fail with 'TypeError: superclass mismatch for class Mark'

Open henrik opened this issue 6 years ago • 11 comments

We upgraded Rubocop from 0.64.0 to 0.65.0. This added a dependency on psych 3.1.0.

The tests for our app on Ruby 2.5.3 and Rails 4.2.11 started failing in CircleCI with:

rake aborted!
TypeError: superclass mismatch for class Mark
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:274:in `require'
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:274:in `block in require'
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:240:in `load_dependency'
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:274:in `require'
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:274:in `require'
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:274:in `block in require'
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:240:in `load_dependency'
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/activesupport-4.2.11/lib/active_support/dependencies.rb:274:in `require'
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/faker-1.9.3/lib/faker.rb:6:in `<top (required)>'
/home/circleci/project/config/application.rb:13:in `<top (required)>'
/home/circleci/project/Rakefile:14:in `require'
/home/circleci/project/Rakefile:14:in `block in <top (required)>'
/home/circleci/project/lib/tasks/no_rails_rake_tasks.rb:9:in `load_rails'
/home/circleci/project/lib/tasks/no_rails_rake_tasks.rb:32:in `top_level'
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/rake-12.3.2/exe/rake:27:in `<top (required)>'
/usr/local/bin/bundle:30:in `block in <main>'
/usr/local/bin/bundle:22:in `<main>'
(See full trace by running task with --trace)

(I'm not sure why the backtrace says "ruby/2.5.0" instead of 2.5.3.)

We also get some warnings like

/usr/local/lib/ruby/2.5.0/psych/versions.rb:4: warning: already initialized constant Psych::VERSION
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/psych-3.1.0/lib/psych/versions.rb:5: warning: previous definition of VERSION was here
/usr/local/lib/ruby/2.5.0/psych/versions.rb:4: warning: already initialized constant Psych::VERSION
/home/circleci/project/vendor/bundle/ruby/2.5.0/gems/psych-3.1.0/lib/psych/versions.rb:5: warning: previous definition of VERSION was here
/usr/local/lib/ruby/2.5.0/x86_64-linux/psych.so: warning: already initialized constant Psych::Parser::ANY

if that's relevant.

henrik avatar Feb 20 '19 11:02 henrik

I'm not sure why the backtrace says "ruby/2.5.0" instead of 2.5.3

FYI: That's just how ruby and rubygems and hence bundler manages the directory path for gems. Ruby 2.5.1, 2.5.2, 2.5.3, etc will all use the same gem load path of ruby/2.5.0/gems... You'll see the same behavior in the installation directory of ruby itself.

rmm5t avatar Feb 20 '19 16:02 rmm5t

It seems like you have a top-level Mark class somewhere in your app, and it caused a conflict with the Parser::Mark class:

https://github.com/ruby/psych/blob/e01839af57df559b26f74e906062be6c692c89c8/lib/psych/parser.rb#L34

I think requiring Psych may fix the issue, but I'm not 100% sure. Given that this code has been there since 2011, I think there's something to do with other dependencies.

yuki24 avatar Feb 22 '19 16:02 yuki24

I have the same failure in case of loading Gem::Specification yaml document.

The log is below:

    74: from /usr/lib/ruby/gems/2.5.0/bin/ruby_executable_hooks:24:in `<main>'
    73: from /usr/lib/ruby/gems/2.5.0/bin/ruby_executable_hooks:24:in `eval'
    72: from /usr/lib/ruby/gems/2.5.0/bin/setup.rb:23:in `<main>'
    71: from /usr/lib/ruby/gems/2.5.0/bin/setup.rb:23:in `load'
    70: from /home/majioa/git/ruby-setup2/bin/setup.rb:27:in `<top (required)>'
    69: from /home/majioa/git/ruby-setup2/lib/setup/command.rb:18:in `run'
    68: from /home/majioa/git/ruby-setup2/lib/setup/command.rb:99:in `run'
    67: from /usr/lib/ruby/optparse.rb:1648:in `parse!'
    66: from /usr/lib/ruby/optparse.rb:1626:in `permute!'
    65: from /usr/lib/ruby/optparse.rb:1532:in `order!'
    64: from /usr/lib/ruby/optparse.rb:1538:in `parse_in_order'
    63: from /usr/lib/ruby/optparse.rb:1538:in `catch'
    62: from /usr/lib/ruby/optparse.rb:1552:in `block in parse_in_order'
    61: from /home/majioa/git/ruby-setup2/lib/setup/command.rb:236:in `block in optparse_install'
    60: from /home/majioa/git/ruby-setup2/lib/setup/command.rb:157:in `configuration'
    59: from /home/majioa/git/ruby-setup2/lib/setup/session.rb:211:in `configuration'
    58: from /home/majioa/git/ruby-setup2/lib/setup/session.rb:211:in `new'
    57: from /home/majioa/git/ruby-setup2/lib/setup/configuration.rb:155:in `initialize'
    56: from /home/majioa/git/ruby-setup2/lib/setup/configuration.rb:197:in `initialize_configfile'
    55: from /home/majioa/git/ruby-setup2/lib/setup/configuration.rb:197:in `each'
    54: from /home/majioa/git/ruby-setup2/lib/setup/configuration.rb:202:in `block in initialize_configfile'
    53: from /home/majioa/git/ruby-setup2/lib/setup/configuration.rb:315:in `project='
    52: from /home/majioa/git/ruby-setup2/lib/setup/configuration.rb:315:in `new'
    51: from /home/majioa/git/ruby-setup2/lib/setup/project.rb:37:in `initialize'
    50: from /home/majioa/git/ruby-setup2/lib/setup/project.rb:109:in `sources='
    49: from /home/majioa/git/ruby-setup2/lib/setup/project.rb:109:in `map'
    48: from /home/majioa/git/ruby-setup2/lib/setup/project.rb:114:in `block in sources='
    47: from /home/majioa/git/ruby-setup2/lib/setup/project.rb:114:in `new'
    46: from /home/majioa/git/ruby-setup2/lib/setup/source/gem.rb:266:in `initialize'
    45: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych.rb:279:in `load'
    44: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/nodes/node.rb:50:in `to_ruby'
    43: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:32:in `accept'
    42: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:6:in `accept'
    41: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:16:in `visit'
    40: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:311:in `visit_Psych_Nodes_Document'
    39: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:32:in `accept'
    38: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:6:in `accept'
    37: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:16:in `visit'
    36: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:208:in `visit_Psych_Nodes_Mapping'
    35: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:374:in `revive'
    34: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:336:in `revive_hash'
    33: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:336:in `each_slice'
    32: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:336:in `each'
    31: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:338:in `block in revive_hash'
    30: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:32:in `accept'
    29: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:6:in `accept'
    28: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:16:in `visit'
    27: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:141:in `visit_Psych_Nodes_Sequence'
    26: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:330:in `register_empty'
    25: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:330:in `each'
    24: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:330:in `block in register_empty'
    23: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:32:in `accept'
    22: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:6:in `accept'
    21: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:16:in `visit'
    20: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:208:in `visit_Psych_Nodes_Mapping'
    19: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:374:in `revive'
    18: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:336:in `revive_hash'
    17: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:336:in `each_slice'
    16: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:336:in `each'
    15: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:338:in `block in revive_hash'
    14: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:32:in `accept'
    13: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:6:in `accept'
    12: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:16:in `visit'
    11: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:208:in `visit_Psych_Nodes_Mapping'
    10: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:374:in `revive'
     9: from /usr/lib/ruby/gems/2.5.0/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:382:in `init_with'
     8: from /usr/lib/ruby/rubygems/requirement.rb:215:in `init_with'
     7: from /usr/lib/ruby/rubygems/requirement.rb:210:in `yaml_initialize'
     6: from /usr/lib/ruby/rubygems.rb:699:in `load_yaml'
     5: from /usr/lib/ruby/rubygems.rb:699:in `require'
     4: from /usr/lib/ruby/psych.rb:19:in `<top (required)>'
     3: from /usr/lib/ruby/psych.rb:19:in `require'
     2: from /usr/lib/ruby/psych/parser.rb:2:in `<top (required)>'
     1: from /usr/lib/ruby/psych/parser.rb:33:in `<module:Psych>'

/usr/lib/ruby/psych/parser.rb:34:in `class:Parser': superclass mismatch for class Mark (TypeError)

The error is risen when both default and custom gems are installed, only when gespec is being parsed.

majioa avatar Mar 05 '19 09:03 majioa

As soon as another team installed psych v3.1.0 (as part of a Rails 5 update?) into our common gemdir, we started seeing failures in Rails3 rake tasks.

This seems to be loaded outside of bundler's context?

I was able to reproduce this failure by installing 3.1.0 directly:

$ gem list psych

*** LOCAL GEMS ***

psych (default: 2.1.0.1)

$ bundle exec rake -T
rake assets:clean                                    # Remove compiled assets
rake assets:precompile                               # Compile all the assets named in config.assets.precompile
rake clean                                           # Remove any temporary products
rake clobber                                         # Remove any generated files
...

$ gem install psych -v=3.1.0
Fetching: psych-3.1.0.gem (100%)
Building native extensions. This could take a while...
Successfully installed psych-3.1.0
1 gem installed

$ gem list psych

*** LOCAL GEMS ***

psych (3.1.0, default: 2.1.0.1)

$ bundle exec rake -T
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/x86_64-linux/psych.so: warning: already initialized constant Psych::Parser::ANY
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/x86_64-linux/psych.so: warning: already initialized constant Psych::Parser::UTF8
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/x86_64-linux/psych.so: warning: already initialized constant Psych::Parser::UTF16LE
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/x86_64-linux/psych.so: warning: already initialized constant Psych::Parser::UTF16BE
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:7: warning: already initialized constant Psych::ClassLoader::BIG_DECIMAL
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:7: warning: previous definition of BIG_DECIMAL was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:8: warning: already initialized constant Psych::ClassLoader::COMPLEX
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:8: warning: previous definition of COMPLEX was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:9: warning: already initialized constant Psych::ClassLoader::DATE
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:9: warning: previous definition of DATE was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:10: warning: already initialized constant Psych::ClassLoader::DATE_TIME
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:10: warning: previous definition of DATE_TIME was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:11: warning: already initialized constant Psych::ClassLoader::EXCEPTION
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:11: warning: previous definition of EXCEPTION was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:12: warning: already initialized constant Psych::ClassLoader::OBJECT
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:12: warning: previous definition of OBJECT was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:13: warning: already initialized constant Psych::ClassLoader::PSYCH_OMAP
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:13: warning: previous definition of PSYCH_OMAP was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:14: warning: already initialized constant Psych::ClassLoader::PSYCH_SET
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:14: warning: previous definition of PSYCH_SET was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:15: warning: already initialized constant Psych::ClassLoader::RANGE
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:15: warning: previous definition of RANGE was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:16: warning: already initialized constant Psych::ClassLoader::RATIONAL
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:16: warning: previous definition of RATIONAL was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:17: warning: already initialized constant Psych::ClassLoader::REGEXP
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:17: warning: previous definition of REGEXP was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:18: warning: already initialized constant Psych::ClassLoader::STRUCT
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:18: warning: previous definition of STRUCT was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:19: warning: already initialized constant Psych::ClassLoader::SYMBOL
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:19: warning: previous definition of SYMBOL was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/class_loader.rb:65: warning: already initialized constant Psych::ClassLoader::CACHE
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/class_loader.rb:65: warning: previous definition of CACHE was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/scalar_scanner.rb:9: warning: already initialized constant Psych::ScalarScanner::TIME
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/scalar_scanner.rb:9: warning: previous definition of TIME was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/scalar_scanner.rb:12: warning: already initialized constant Psych::ScalarScanner::FLOAT
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/scalar_scanner.rb:12: warning: previous definition of FLOAT was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/scalar_scanner.rb:18: warning: already initialized constant Psych::ScalarScanner::INTEGER
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/scalar_scanner.rb:17: warning: previous definition of INTEGER was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/stream.rb:13: warning: already initialized constant Psych::Nodes::Stream::ANY
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/stream.rb:13: warning: previous definition of ANY was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/stream.rb:16: warning: already initialized constant Psych::Nodes::Stream::UTF8
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/stream.rb:16: warning: previous definition of UTF8 was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/stream.rb:19: warning: already initialized constant Psych::Nodes::Stream::UTF16LE
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/stream.rb:19: warning: previous definition of UTF16LE was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/stream.rb:22: warning: already initialized constant Psych::Nodes::Stream::UTF16BE
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/stream.rb:22: warning: previous definition of UTF16BE was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/sequence.rb:43: warning: already initialized constant Psych::Nodes::Sequence::ANY
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/sequence.rb:43: warning: previous definition of ANY was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/sequence.rb:46: warning: already initialized constant Psych::Nodes::Sequence::BLOCK
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/sequence.rb:46: warning: previous definition of BLOCK was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/sequence.rb:49: warning: already initialized constant Psych::Nodes::Sequence::FLOW
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/sequence.rb:49: warning: previous definition of FLOW was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/scalar.rb:10: warning: already initialized constant Psych::Nodes::Scalar::ANY
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/scalar.rb:10: warning: previous definition of ANY was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/scalar.rb:13: warning: already initialized constant Psych::Nodes::Scalar::PLAIN
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/scalar.rb:13: warning: previous definition of PLAIN was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/scalar.rb:16: warning: already initialized constant Psych::Nodes::Scalar::SINGLE_QUOTED
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/scalar.rb:16: warning: previous definition of SINGLE_QUOTED was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/scalar.rb:19: warning: already initialized constant Psych::Nodes::Scalar::DOUBLE_QUOTED
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/scalar.rb:19: warning: previous definition of DOUBLE_QUOTED was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/scalar.rb:22: warning: already initialized constant Psych::Nodes::Scalar::LITERAL
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/scalar.rb:22: warning: previous definition of LITERAL was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/scalar.rb:25: warning: already initialized constant Psych::Nodes::Scalar::FOLDED
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/scalar.rb:25: warning: previous definition of FOLDED was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/mapping.rb:17: warning: already initialized constant Psych::Nodes::Mapping::ANY
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/mapping.rb:17: warning: previous definition of ANY was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/mapping.rb:20: warning: already initialized constant Psych::Nodes::Mapping::BLOCK
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/mapping.rb:20: warning: previous definition of BLOCK was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/nodes/mapping.rb:23: warning: already initialized constant Psych::Nodes::Mapping::FLOW
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/nodes/mapping.rb:23: warning: previous definition of FLOW was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/visitors/visitor.rb:11: warning: already initialized constant Psych::Visitors::Visitor::DISPATCH
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/visitors/visitor.rb:11: warning: previous definition of DISPATCH was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:334: warning: already initialized constant Psych::Visitors::ToRuby::SHOVEL
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/visitors/to_ruby.rb:334: warning: previous definition of SHOVEL was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/handler.rb:27: warning: already initialized constant Psych::Handler::OPTIONS
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/handler.rb:27: warning: previous definition of OPTIONS was here
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/psych/handler.rb:30: warning: already initialized constant Psych::Handler::EVENTS
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/psych-3.1.0/lib/psych/handler.rb:30: warning: previous definition of EVENTS was here
rake aborted!
TypeError: superclass mismatch for class Mark
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/activesupport-3.2.22.4/lib/active_support/ordered_hash.rb:2:in `require'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/activesupport-3.2.22.4/lib/active_support/ordered_hash.rb:2:in `<top (required)>'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/activesupport-3.2.22.4/lib/active_support/ordered_options.rb:1:in `require'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/activesupport-3.2.22.4/lib/active_support/ordered_options.rb:1:in `<top (required)>'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/configuration.rb:2:in `require'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/configuration.rb:2:in `<top (required)>'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/railtie.rb:2:in `require'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/railtie.rb:2:in `<top (required)>'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/engine.rb:1:in `require'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/engine.rb:1:in `<top (required)>'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/plugin.rb:1:in `require'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/plugin.rb:1:in `<top (required)>'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/application.rb:3:in `require'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/application.rb:3:in `<top (required)>'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails.rb:10:in `require'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails.rb:10:in `<top (required)>'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/all.rb:1:in `require'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/railties-3.2.22.4/lib/rails/all.rb:1:in `<top (required)>'
/local/myrailsapp/config/application.rb:3:in `require'
/local/myrailsapp/config/application.rb:3:in `<top (required)>'
/local/myrailsapp/Rakefile:5:in `require'
/local/myrailsapp/Rakefile:5:in `<top (required)>'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/gems/rake-12.3.2/exe/rake:27:in `<top (required)>'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/bin/ruby_executable_hooks:24:in `eval'
/shared/rvm/gems/ruby-2.3.7@myrailsapp/bin/ruby_executable_hooks:24:in `<main>'
(See full trace by running task with --trace)

I tried to add this explicitly to my Gemfile, but got another error then:

$ grep psych Gemfile*
Gemfile:  gem 'psych', '~> 2.1'
Gemfile.lock:    psych (2.2.4)
Gemfile.lock:  psych (~> 2.1)!

$ bundle exec rake -T
/shared/rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:313:in `check_for_activated_spec!': You have already activated psych 3.1.0, but your Gemfile requires psych 2.2.4. Prepending `bundle exec` to your command may solve this. (Gem::LoadError)
  from /shared/rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:31:in `block in setup'
  from /shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/forwardable.rb:202:in `each'
  from /shared/rvm/rubies/ruby-2.3.7/lib/ruby/2.3.0/forwardable.rb:202:in `each'
  from /shared/rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:26:in `map'
  from /shared/rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/bundler/runtime.rb:26:in `setup'
  from /shared/rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/bundler.rb:107:in `setup'
  from /shared/rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/bundler/setup.rb:10:in `<top (required)>'
  from /shared/rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:54:in `require'
  from /shared/rvm/rubies/ruby-2.3.7/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:54:in `require'

coldnebo avatar Mar 08 '19 19:03 coldnebo

UPDATE: it seems that rubocop 0.65.0 has a dependency on psych 3.1.0 and pulled it in.

WORKAROUND: As I mention in Rubocop's issue thread, this seems to be because they require psych 3.1.0 and have a ruby version requirement >= 2.2.2

gem 'rubocop', '<= 0.64.0'

Psych is tightly integrated to Ruby core, so it is dangerous for Rubocop to spec it without a higher ruby version requirement.

Note:

  • Ruby 2.6.1 depends on psych 3.1.0
  • Ruby 2.6.0 made the switch to psych 3.1.0
  • Ruby 2.5.0 made the switch to psych 3.0.0
  • Ruby 2.3.7 depends on psych 2.1.0.1

coldnebo avatar Mar 08 '19 20:03 coldnebo

Dear people who faced this issue. Does the following script work on your environment?

$ cat test.rb 
require 'psych'
Gem.load_yaml

$ ruby test.rb

What is the result of the following command?

$ gem info psych

Because I faced the error in Fedora RPM Ruby here. https://bugzilla.redhat.com/show_bug.cgi?id=1835836

junaruga avatar May 14 '20 15:05 junaruga

It seems that this issue comes from https://github.com/rubygems/rubygems/issues/3131 .

junaruga avatar May 15 '20 09:05 junaruga

Maybe here is the temporary workflow to avoid the issue, that I reported here.

<mock-chroot> sh-5.0# diff -u /usr/share/rubygems/rubygems.rb{.orig,}
--- /usr/share/rubygems/rubygems.rb.orig	2020-03-31 12:44:55.000000000 +0200
+++ /usr/share/rubygems/rubygems.rb	2020-05-15 11:43:34.851595500 +0200
@@ -685,7 +685,11 @@
     return unless defined?(gem)
 
     begin
-      gem 'psych', '>= 2.0.0'
+      begin
+        require 'psych'
+      rescue ::LoadError
+        gem 'psych', '>= 2.0.0'
+      end
     rescue Gem::LoadError
       # It's OK if the user does not have the psych gem installed.  We will
       # attempt to require the stdlib version

junaruga avatar May 15 '20 09:05 junaruga

For rubocop, it seems the they dropped psych. Maybe this issue does not happen with rubocop >= 0.68.0. https://github.com/rubocop-hq/rubocop/commit/95d2110e49e160ffb785a74b22727593f17d552b

junaruga avatar May 15 '20 10:05 junaruga

Maybe when you use rubygems applying the following one or both of the following commits, the issue does not happen.

https://github.com/rubygems/rubygems/commit/f3da3c1190afe0b759cef53fb51ec9079182d894 https://github.com/rubygems/rubygems/commit/1ccf0912a161d20e0c4a7b139fd76e8739a411ba

junaruga avatar May 20 '20 14:05 junaruga

You can try the following code in irb/pry console

class One
end

class Two
end

class Test < Two
end

Class Test < One
end

This is the kind of error reported

TypeError: superclass mismatch for class Test

wy-ruby avatar Sep 24 '20 08:09 wy-ruby