Bug #18067: Composite procs with `instance_exec` aren't executed within the context of the receiver

• Status: Rejected
• Assignee: -
• Target version: -
• Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN

[ttanimichi (Tsukuru Tanimichi)]

func1 = -> (x) { x + y }

class A
  def y
    10
  end
end

A.new.instance_exec(1, &func1) # => 11

func2 = -> (x) { x * 2 }
f = func1 >> func2
A.new.instance_exec(1, &f) # => undefined local variable or method `y' for main:Object (NameError)

[jeremyevans0 (Jeremy Evans)]

I think this is expected. You get the same error if you compose the proc manually, and the proc composition operators should reflect the same behavior as manual composition:

func1 = -> (x) { x + y }

class A
  def y
    10
  end
end

A.new.instance_exec(1, &func1) # => 11

func2 = -> (x) { x * 2 }
f = ->(x) { func2.(func1.(x)) }
A.new.instance_exec(1, &f) # => undefined local variable or method `y' for main:Object (NameError)

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Rejected

[jeremyevans0 (Jeremy Evans)]

• Has duplicate Feature #18815: instance_{eval,exec} vs Proc#>> added