Otherwise, the following script prints an uninitialized value.

def f(*a)
  if false
    b = 15
  end
  p b
end
f(1,2,3)

Attach a name to  embbeded value of rescue/ensure stack size

Get constant of parent class even if child class is defined in signle…

ref #3588

Correctly handle large negative usec value.

Change AppVeyor's clone_depth

This reverts commit 6dabb336.

Change return value of Enumerable#each_slice

Change return value of Enumberable#each_cons

More compatibility to CRuby.

More compatibility to CRuby.

Note this is a temporary fix. Error message generation
(including `inspect`) should be deferred until its use.