Issue #10006 has been updated by Nobuyoshi Nakada.


It may need further consideration whether `instance_exec` should affect the wrapped proc.

----------------------------------------
Bug #10006: instance_exec uses incorrect binding with curried proc
https://bugs.ruby-lang.org/issues/10006#change-47760

* Author: John Ledbetter
* Status: Open
* Priority: Normal
* Assignee: 
* Category: core
* Target version: current: 2.2.0
* ruby -v: ruby 2.2.0dev (2014-07-02 trunk 46660) [x86_64-darwin13]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
After using `Proc#curry`, `instanve_eval`/`instance_exec` does not seem to work:

~~~ruby
class Test
  def test_func
    140
  end
end  # => :test_func

p = ->(x, y) { x + y + test_func }  # => #<Proc:0x007fd23b12bc80@(irb):6 (lambda)>

test = Test.new                     # => #<Test:0x007fd23b0f3d08>
test.instance_exec(1, 2, &p)        # => 143

curried = p.curry[1]                # => #<Proc:0x007fb3142be070 (lambda)>
test.instance_exec(2, &curried)
~~~
~~~
NameError: undefined local variable or method `test_func' for main:Object
	from (irb):6:in `block in irb_binding'
	from (irb):10:in `instance_exec'
	from (irb):10
	from ./bin/irb:11:in `<main>'
~~~



-- 
https://bugs.ruby-lang.org/