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Error:[rake --tasks] /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:286:in block in verify_gemfile_dependencies_are_found!': Could not find gem 'puma (~> 3.11)' in any of the gem sources listed in your Gemfile. (Bundler::GemNotFound) from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:254:ineach' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:254:in verify_gemfile_dependencies_are_found!' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:48:instart' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:22:in resolve' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:258:inresolve' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:171:in specs' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:238:inspecs_for' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:227:in requested_specs' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/runtime.rb:108:inblock in definition_method' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/runtime.rb:20:in setup' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler.rb:107:insetup' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/setup.rb:20:in <top (required)>' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:inrequire' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in rescue in require' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:39:inrequire' from /Users/abhisumishra/RubymineProjects/untitled5/config/boot.rb:3:in <top (required)>' from /Users/abhisumishra/RubymineProjects/untitled5/bin/rake:2:inrequire_relative' from /Users/abhisumishra/RubymineProjects/untitled5/bin/rake:2:in <main>' Error:[rake --prereqs] /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:286:inblock in verify_gemfile_dependencies_are_found!': Could not find gem 'puma (~> 3.11)' in any of the gem sources listed in your Gemfile. (Bundler::GemNotFound) from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:254:in each' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:254:inverify_gemfile_dependencies_are_found!' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:48:in start' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:22:inresolve' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:258:in resolve' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:171:inspecs' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:238:in specs_for' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:227:inrequested_specs' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/runtime.rb:108:in block in definition_method' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/runtime.rb:20:insetup' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler.rb:107:in setup' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/setup.rb:20:in' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in require' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:inrescue in require' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:39:in require' from /Users/abhisumishra/RubymineProjects/untitled5/config/boot.rb:3:in' from /Users/abhisumishra/RubymineProjects/untitled5/bin/rake:2:in require_relative' from /Users/abhisumishra/RubymineProjects/untitled5/bin/rake:2:in' These are the errors I get when trying to install rails. Please help.

A Denver
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  • https://stackoverflow.com/questions/30143180/puma-gem-failed-to-build-gem-native-extension/43174470#43174470 – Beartech Sep 25 '18 at 20:51
  • Also you should edit your question to include: platform and version you are using, what command did you execute to get the error, any other troubleshooting steps you've taken. – Beartech Sep 25 '18 at 20:53

2 Answers2

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I believe installing Ruby Gem puma should solve your problem.

Regards.

Aravind
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  • Welcome to Stack Overflow. This is a minimal answer. It would be more helpful if you provided an explanation along instructions for the installation. [How to Answer](https://stackoverflow.com/help/how-to-answer). Thanks. – Elletlar Sep 25 '18 at 21:14
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In this case, the first line is your error. It looks like you are requiring puma in your code or your gemfile (or...one of the gems you are requiring relies on puma).

You should add puma version 3.11 to your gemfile, then run bundle-install to install everything in your gemfile.

C.J. Coffey
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