tail -f log/puma.stderr.log していたらpumaのlogで下記落ちていた. (解決策) It seems like a bug in MRI 2.4. Follow these threads here and here Thanks! Updating to 2.4.1 solved the problem in my case. – dusan Nov 16 '17 at 13:59 https://stackoverflow.com/questions/46120738/rails-segmentation-fault-using-mongoid https://jira.mongodb.org/browse/RUBY-1202 https://jira.mongodb.org/browse/RUBY-1231 https://jira.mongodb.or
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