Gem::Ext::BuildError: ERROR: Failed to build gem native extension. on CenOS 6.5

Question

Installing Redmine. I\'ve tried,

bundle install --without development test postgresql sqlite

, but error.

Gem::Ext::BuildError: ERR

Answer 1

it seems that the json gem is having a bug with newer ruby version (2.4+), that answer from makandracards is proposing a simple and easy solution.

the answer is about updating the version of json gem to tackle the bug and successfully install the gem. so, it updates the json gem with --conservative option.

bundle update json --conservative