undefined method `reset' for RDoc::TopLevel:Class when installing a new Ruby gem

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undefined method `reset' for RDoc::TopLevel:Class when installing a new Ruby gem



For example,


$ gem install netaddr
Fetching: netaddr-1.5.1.gem (100%)
Successfully installed netaddr-1.5.1
ERROR: While executing gem ... (NoMethodError)
undefined method `reset' for RDoc::TopLevel:Class



The NoMethodError exception keeps being raised when I install any new gem. I googled about it and searched issues in RDoc and RubyGems GitHub repositories, but had no luck.



My Ruby version is


$ ruby -v
ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin15]



The RubyGems version is


$ gem -v
2.5.1



The installed RDoc version is


$ gem search rdoc -l

*** LOCAL GEMS ***

rdoc (4.2.2, 4.2.1)



I installed Ruby with RVM on Mac OS X El Capitan.



Thanks!





I have exactly the same environment as you do, except for ruby version (mine is ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin15]), and had no problem installing the gem.
– dhrubo_moy
Aug 20 '16 at 4:20


ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin15]





I've got the same problem as OP with ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux] & gem 2.7.7 and for me it happened while installing rdoc itself: rdoc-6.0.4
– konserw
Jun 2 at 12:39




ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]


gem 2.7.7


rdoc-6.0.4





Did anyone figure this out?
– Josh Edwards
Jul 13 at 11:38




1 Answer
1



I had a similar issue:


$ gem install rdoc
Fetching: rdoc-6.0.4.gem (100%)
WARNING: You don't have /home/myusername/.gem/ruby/2.5.0/bin in your PATH,
gem executables will not run.
Successfully installed rdoc-6.0.4
ERROR: While executing gem ... (NoMethodError)
undefined method `reset' for RDoc::TopLevel:Class



Same when installing compass. After adding /home/myusername/.gem/ruby/2.5.0/bin to $PATH, this worked for me:


compass


/home/myusername/.gem/ruby/2.5.0/bin


$PATH


$ gem install rdoc
Successfully installed rdoc-6.0.4
Parsing documentation for rdoc-6.0.4
Installing ri documentation for rdoc-6.0.4
Done installing documentation for rdoc after 3 seconds
1 gem installed






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