two proc related bugs

```
What steps will reproduce the problem?

1.
require 'test2'

x=1
$A = proc {x=2}

#def f; $A.call; end

g
print x

2.
def f
    a = Proc.new {return 1} # replace Proc.new with proc, the result is 
different!
    a.call
    print 'xxx'
end

f




```

Original issue reported on code.google.com by `xue.yong...@gmail.com` on 30 Jun 2007 at 5:48
