local_variables is broken

[i110]

def _generate
  var = 110
  proc {|hoge| p local_variables }
end
_generate.call

outputs [:hoge], but I expect [:hoge, :var] as CRuby does.

As I looked the code, struct REnv * assigned to the generated proc gets unshared when cipop called in OP_RETURN, and that makes the env not enumarated. Is this a mruby's spec or not?

Even if that's a spec, I believe that the following behavior is absolutely a bug.

def _generate
  eval("var = 110; proc {|hoge| p local_variables }")
end

def _call(invisible)
  invisible.call
end

_call(_generate)

says [:hoge, :invisible], but if I'm correct invisible shouldn't appear.
In this case, the env of the generated proc is not unshared due to another callinfo, but mrb_local_variables refers current callinfo stack, so variables not related to the proc appears. As a similar example,

def _generate
  eval("var = 110; proc {|hoge| p local_variables }")
end

def dummy(invisible)
end

Fiber.new {
  ret = _generate
  dummy(nil)
  ret
}.resume.call

outputs the same, [:hoge, :invisible]. In this case, another context's callinfo which gets overwrited by calling dummy function is referred.

[matz]

The first issue is mruby limitation. We will try to address it but it would take time.
The second issue is caused by a bug in eval (create_proc_from_string).

[i110]

Actually I found the first issue when debugging the second one, so I'm not stacked at that if I know that's a limitation. Thanks a lot!

[matz]

Oops, issue number was wrong.