Redmine

I've written a full detailed message on StackOverflow. Should I copy and paste here for answers?
Even running bin/about inside redmine folder gives me:

/usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:155: [BUG] Segmentation fault at 0x00000000000000
ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-linux]
....

I get this problem only on RedHat 6.