Rails Server will not run

问题:

Typing

$ rails server 

in terminal on mac yields these two errors that I've tried troubleshooting by uninstalling and installing ruby & rails again and get this same error.

Typing

localhost:3000 

on the browser brings a broken webpage meaning rails is not running properly.

As a complete beginner, how do i troubleshoot these problems below simply step by step to get rails to run?

Ignoring binding_of_caller-0.7.2 because its extensions are not built.  Try: gem pristine binding_of_caller --version 0.7.2
Ignoring byebug-8.2.2 because its extensions are not built.  Try: gem pristine byebug --version 8.2.2
Ignoring debug_inspector-0.0.2 because its extensions are not built.  Try: gem pristine debug_inspector --version 0.0.2
Ignoring executable-hooks-1.3.2 because its extensions are not built.  Try: gem pristine executable-hooks --version 1.3.2
Ignoring gem-wrappers-1.2.7 because its extensions are not built.  Try: gem pristine gem-wrappers --version 1.2.7
Ignoring mysql2-0.4.2 because its extensions are not built.  Try: gem pristine mysql2 --version 0.4.2
Ignoring nokogiri-1.6.7.2 because its extensions are not built.  Try: gem pristine nokogiri --version 1.6.7.2
Ignoring binding_of_caller-0.7.2 because its extensions are not built.  Try: gem pristine binding_of_caller --version 0.7.2
Ignoring byebug-8.2.2 because its extensions are not built.  Try: gem pristine byebug --version 8.2.2
Ignoring debug_inspector-0.0.2 because its extensions are not built.  Try: gem pristine debug_inspector --version 0.0.2
Ignoring executable-hooks-1.3.2 because its extensions are not built.  Try: gem pristine executable-hooks --version 1.3.2
Ignoring gem-wrappers-1.2.7 because its extensions are not built.  Try: gem pristine gem-wrappers --version 1.2.7
Ignoring mysql2-0.4.2 because its extensions are not built.  Try: gem pristine mysql2 --version 0.4.2
Ignoring nokogiri-1.6.7.2 because its extensions are not built.  Try: gem pristine nokogiri --version 1.6.7.2
dyld: lazy symbol binding failed: Symbol not found: _rb_data_typed_object_alloc
  Referenced from: /Users/Leviathan/.rvm/gems/ruby-2.2.1/gems/debug_inspector-0.0.2/lib/debug_inspector.bundle
  Expected in: flat namespace

dyld: Symbol not found: _rb_data_typed_object_alloc
  Referenced from: /Users/Leviathan/.rvm/gems/ruby-2.2.1/gems/debug_inspector-0.0.2/lib/debug_inspector.bundle
  Expected in: flat namespace

Trace/BPT trap: 5

回答1:

EDIT: try running gem pristine --all first.

Try uninstalling and reinstalling bundler:

gem uninstall bundler then gem install bundler

Then run bundle install.

This will install all the gems you should have specified in your Gemfile, as well as all the extensions.

E.g Bundle complete! 33 Gemfile dependencies, 103 gems now installed.