Jira (PUP-11106) superclass mismatch for class Uniquefile (TypeError)

Josh Cooper (Jira) Thu, 22 Jul 2021 17:15:10 -0700

Title: Message Title

Josh Cooper commented on

Philipp H Ok, so the UniqueFile class is somewhat special, as it will result in a hard failure if an attempt is made to load the file twice. The Uniquefile class extends an anonymous superclass Delegate(File). So the second time Uniquefile is loaded, the file will reopen the class and try to assign it to a different superclass, which is not allowed.

My guess is the combination of symlinks and relative_require is causing uniquefile.rb to first be loaded as:

/usr/lib/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/util/uniquefile.rb

Then the autoloader calls Dir.glob so we see:

8: from /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/indirector/file_metadata/selector.rb:1:in `<top (required)>'

And that ends trying to load uniquefile with a different path:

/opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/file_system/uniquefile.rb

Prior to the move to relative_require, puppet would have searched its $LOAD_PATH for something matching puppet/file_system/uniquefile.rb, and /usr/lib/opt/... most likely was earlier in the search path.

Note there is a closely related problem on Windows, which results in the same exception when mixing 8.3 and long file paths, see PUP-11184.

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Jira (PUP-11106) superclass mismatch for class Uniquefile (TypeError)

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