mailcatcher: `method_missing': undefined method `this' for # (NoMethodError)

I have installed both mailcatcher versions 0.6.3 and 0.6.1.

When I run the command mailcatcher, I get the following error:

/Users/jquigl44/.rvm/rubies/ruby-2.2.2/lib/ruby/site_ruby/2.2.0/rubygems/specification.rb:2159:in `method_missing': undefined method `this' for #<Gem::Specification:0x3fc0e842c3fc activesupport-4.2.5.1> (NoMethodError)
    from /Users/jquigl44/.rvm/rubies/ruby-2.2.2/lib/ruby/site_ruby/2.2.0/rubygems/specification.rb:1057:in `find_active_stub_by_path'
    from /Users/jquigl44/.rvm/rubies/ruby-
. . .
    from /Users/jquigl44/.rvm/gems/ruby-2.2.2@avant_basic/bin/ruby_executable_hooks:15:in `<main>'

Please help.

About this issue

Original URL
State: closed
Created 8 years ago
Comments: 35 (10 by maintainers)

Most upvoted comments

This worked for me. $ gem uninstall mailcatcher (from your local gemset)

As per the instructions on mailcatcher.me, run the following two lines: $ rvm default@mailcatcher --create do gem install mailcatcher $ rvm wrapper default@mailcatcher --no-prefix mailcatcher catchmail

$ mailcatcher Starting MailCatcher ==> smtp://127.0.0.1:1025 ==> http://127.0.0.1:1080 *** MailCatcher runs as a daemon by default. Go to the web interface to quit.

+45

charazn on Mar 11, 2016

I was able to fix this error by upgrading rubygems to the latest version

gem update --system

+21

rnickmccandless on Jun 12, 2016

It’s a bug in rubygems, may be below listed help you.

Open file rubygems/specification.rb /Users/amitagarwal/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/specification.rb
add method def this; self; end in the end of file
rvm reload
restart your application

amitdotagarwal on May 31, 2016

I ran in to this error when trying to run use the travis gem. Running gem pristine --all fixed it for me.

cameronstanley on Feb 10, 2016

It doesn’t.

It seems to happen in a particular edge case with rubygems, rvm and bundler. MailCatcher being an independent gem often used within projects with similar dependencies using bundler seems to hit the edge case more often.

sj26 on Apr 10, 2016