[ruby-core:125812] [Ruby Bug#22124] void value missed in parse.y

23 Jun 2026

      Issue #22124 has been updated by nobu (Nobuyoshi Nakada).

Backport changed from 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN to 3.3: REQUIRED, 3.4: REQUIRED, 4.0: REQUIRED

Thanks, it looks a very old standing bug.

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Bug #22124: void value missed in parse.y
https://bugs.ruby-lang.org/issues/22124#change-117728

* Author: kddnewton (Kevin Newton)
* Status: Open
* Backport: 3.3: REQUIRED, 3.4: REQUIRED, 4.0: REQUIRED
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```
$ ruby --parser=parse.y -cwe 'x = return a b do end'
Syntax OK
$ ruby --parser=prism -cwe 'x = return a b do end'
ruby: -e:1: syntax error found (SyntaxError)
...
1 | x = return a b do end
    |     ^~~~~~~~~~~~~~~~~ unexpected void value expression

I think it's likely because of the wrapped block expression.

-- 
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