Bug #21808: Inconsistency in support of additional newlines with boolean logical operators on new line

• Status: Assigned
• Assignee: matz (Yukihiro Matsumoto)
• Target version: -
• ruby -v: ruby 4.0.0 (2025-12-25 revision 553f1675f3) +PRISM [x86_64-linux]
• Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN

[herwin (Herwin W)]

With this I mean the new Ruby 4 feature.

With the old style, one could add additional lines in between:

if true &&

   true
     puts 'match'
end

With the new style, this results in a syntax error

if true

   && true
     puts 'match'
end

If a comment is used instead of a new line, it still works

if true
   # blah
   && true
     puts 'match'
end

This happens with both prism and parse.y

I doubt anyone would want to write code like this (I don't think it improves the layout), but it's still a weird inconsistency that doesn't get mentioned.

[mame (Yusuke Endoh)]

• Status changed from Open to Assigned
• Assignee set to matz (Yukihiro Matsumoto)

If I recall, this is intentional. A blank line before a period for a method call also causes a parsing error.

$ ruby -e '"foo"
>
> .upcase'
-e: -e:3: syntax error found (SyntaxError)
  1 | "foo"
  2 |
> 3 | .upcase
    | ^ unexpected '.', ignoring it

That said, I personally agree that it looks inconsistent. I'd like to confirm this with Matz.