do/end and break precedence issue with omitted parens

[headius]

Environment

JRuby 9.1 HEAD

Expected Behavior

Code looking like below exists in Bundler. The break here should work fine since it's within the block passed to foo.

def foo; yield; end
def bar(*); end
bar foo do
  break
end

Actual Behavior

The above code and the similar code in Bundler both raise LocalJumpError. It seems like the break is getting marked as invalid even though it appears inside a block.

To trigger it, run bundle exec from a dir that has no Gemfile, but has a parent dir with a Gemfile.

[headius]

My repro is faulty...it was failing for a different reason.

The code from RubyGems (not Bundler) is here:

    Gem::Util.traverse_parents Dir.pwd do |directory|
      next unless gemfile = Gem::GEM_DEP_FILES.find { |f| File.file?(f.untaint) }

      gemfile = File.join directory, gemfile
      break
    end unless gemfile

[headius]

JRuby 9.1.12 does not appear to have the problem. After installing and updating RubyGems, it's able to bundle exec just fine.

[headius]

Ok I've managed to come up with a reduced repro. It only fails in the interpreter.

def bar(&block)
  2.times do |i|
    p i
    foo(i, &block)
  end
end

def foo(i)
  yield i
end

bar {|i| break if i == 1 }