CODEWITHSUNDEEP
ruby-on-railsdatabaserake
Steven
Steven

Reputation: 9

Ubuntu Rake command causes segmentation fault

I am trying to setup a rails project and I have to use the rake db:create command to create a database. However using this command causes a Segmentation Fault bug with this error: 

/home/steven/.rvm/gems/ruby-2.2.1/gems/json-1.8.3/lib/json/ext/parser.so: [BUG] Segmentation fault
ruby 1.9.3p484 (2013-11-22 revision 43786) [x86_64-linux]

However when I run the command bin/rake db:create I do not get a segmentation fault. I have googled and could not find the reason for this, does anyone know what the cause of this problem is? Is this a serious problem?

After further testing, this seems to be a problem with the rake command. Still not sure what is causing this.

EDIT Running the which -a rake command gives 

/home/steven/.rvm/gems/ruby-2.2.1/bin/rake
/home/steven/.rvm/rubies/ruby-2.2.1/bin/rake
/usr/local/bin/rake

Running the which ruby gives

/home/steven/.rvm/rubies/ruby-2.2.1/bin/ruby

Upvotes: 0

Views: 464

Answers (1)

Devin Howard
Devin Howard

Reputation: 705

EDIT: This page looks like it has the answer: you need to reload/reinstall ruby.

Issue with json 1.8.1 gem in rails app on production

 

From what you've said above, I can see that you're using rvm. It looks like the gemset for the default rake is ruby-2.2.1, but there's an error involving ruby 1.9.3p484. That's a problem

Let's assume you want to use ruby 1.9.3p484 for your project. From the project directory, run rvm use 1.9.3p484 and it should switch the PATH variable to set things right.

To see more details about which rake executable you're using, and what's available, and the order of directories Ubuntu searches for a rake executable, you can use

  • which -a rake -> list all possible rake executables on your PATH
  • echo $PATH -> show the PATH variable, which has all the directories Ubuntu searches
  • which rake -> show the rake used by default

Now, the reason bin/rake db:create works is because it's the right version of ruby. To set things right, you need to do the rvm use command.

For me, the correct rvm gemset is automatically switched to when I cd to the rails directory. I forget exactly how this works on Ubuntu, but I do know one clue: you need to be in a login shell. You can type su - steven to switch to a login shell, but in the Gnome Terminal preferences there's probably something about making sure you're in a login shell.

If you're already in a login shell but it's not working, you could also add

export PATH=/home/steven/.rvm/rubies/ruby-1.9.3p484/bin:$PATH

to the /home/steven/.bashrc and/or the /home/steven/.bash_profile file (I can never remember which).

There are a lot of reasons why this wouldn't work though, so feel free to comment with more details or update your question and I'll see if I can offer more ideas. - List item

Upvotes: 1

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