Bug #20092: Warnings for anonymous parameters do not display in Ruby 3.4dev

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 3.4.0dev (2023-12-26T22:32:38Z master be92bf4ff4) [x86_64-darwin22]
• Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN

[koic (Koichi ITO)]

I encountered no expected warnings in Ruby 3.4dev.

Reproduction code

def anonymous(*, **, &)
  rest_block do
    foo(*)
  end

  kwrest_block do
    bar(**)
  end

  block_block do
    baz(&)
  end
end

Expected Behavior (Ruby 3.3.0)

Warnings are displayed:

$ ruby -vc example.rb
ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [x86_64-darwin22]
example.rb: example.rb:3: anonymous rest parameter is also used within block (SyntaxError)
example.rb:7: anonymous keyword rest parameter is also used within block
example.rb:11: anonymous block parameter is also used within block

Actual Behavior (Ruby 3.4dev)

No warning displayed:

$ ruby -vc example.rb
ruby 3.4.0dev (2023-12-26T22:32:38Z master be92bf4ff4) [x86_64-darwin22]
Syntax OK

[nobu (Nobuyoshi Nakada)]

The behavior in 3.4.0 is correct.
It was a bug #20090.

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed