Bundler::MarshalError TypeError: incompatible marshal file format + Ruby CAS Server

Question

I have clone the rubycas-server project and followed the steps as they mentioned in their documentation. When I am doing the bundle install I am getting the following error:

Fetching gem metadata from http://rubygems.org/....Retrying dependency api due to error (2/4): Bundler::MarshalError TypeError: incompatible marshal file format (can't be read)
format version 4.8 required; 60.72 given
Retrying dependency api due to error (3/4): Bundler::MarshalError TypeError: incompatible marshal file format (can't be read)
format version 4.8 required; 60.72 given
Retrying dependency api due to error (4/4): Bundler::MarshalError TypeError: incompatible marshal file format (can't be read)
format version 4.8 required; 60.72 given

I don't know why this message is coming and I am using Ruby 1.8.7. Is any step missed or which ruby version is appropriate for running the Ruby CAS Server?

Answer 1

You can try

bundle install --full-index

Which forces fresh download of index