Parallel value assignment broken in IR builder (multi-value literals, calls, attr-assign, etc.) #2574
Description
It appears as if variables in expressions are evaluated at a later stage in jruby-head than in MRI and JRuby 1.7.19, as shown in the example below.
$ rvm jruby-head,jruby-1.7.19,2.2.0 do ruby -e 'a=0;b=[a,a=1];p(b)'
[1, 1]
[0, 1]
[0, 1]
Or more readable
a = 0
[a, (a = 1)] # => [1, 1]This is as minimal an example as I've been able to produce, and I don't really know where to continue the investigation.