From: "Bartosz Dziewoński" <matma.rex@...>
Date: 2012-06-11T01:51:10+09:00
Subject: Re: Is "a,b=c,d" atomic? or do I need a Mutex?

It is atomic on MRI. It may or may not be on other interpreters, if
you care about them. (But probably should be as an element of the
syntax.)

Array#<< may or may not be atomic as well. (It is on MRI.)

-- Matma Rex