Bug #18558: Numbered arguments + eval

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 3.1.0p0 (2021-12-25 revision fb4df44d16) [arm64-darwin20]
• Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN

[radarek (Radosław Bułat)]

def yield_2_args
  yield 1, 2
end

yield_2_args { p [eval("_1"), _2] }

Running with ruby 2.7.2, I get output:

[1, 2]
[1, 2]

With 3.0.2, I get output:

[1, 2]
(eval):1:in `block in <main>': undefined local variable or method `_1' for main:Object (NameError)
	from bug.rb:6:in `eval'
	from bug.rb:6:in `block in <main>'
	from bug.rb:2:in `yield_2_args'
	from bug.rb:6:in `<main>'

Is is intentional change between 2.7.x and 3.0.x?

[nobu (Nobuyoshi Nakada)]

• Related to Feature #16432: Using `_1` inside `binding.irb` will cause unintended behavior added

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Yes, see [Feature #16432].