From: "qnighy (Masaki Hara) via ruby-core" <ruby-core@...>
Date: 2025-03-16T05:13:24+00:00
Subject: [ruby-core:121376]  [Ruby Bug#21186] Inconsistent parsing of ?あand 0

Issue #21186 has been reported by qnighy (Masaki Hara).

----------------------------------------
Bug #21186: Inconsistent parsing of ?���and 0
https://bugs.ruby-lang.org/issues/21186

* Author: qnighy (Masaki Hara)
* Status: Open
* ruby -v: ruby 3.5.0dev (2025-03-16T03:09:18Z master 06919949a6) +PRISM [x86_64-linux]
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
`?���and 0` has inconsistent behavior between Prism and parse.y.

```console
% ./miniruby --parser=parse.y -e "?aand 0"
-e:1: syntax error, unexpected '?'
?aand 0
./miniruby: compile error (SyntaxError)

% ./miniruby --parser=parse.y -e "?���and 0"

% ./miniruby --parser=prism -e "?aand 0"
-e: -e:1: syntax error found (SyntaxError)
> 1 | ?aand 0
    | ^ unexpected '?', ignoring it


% ./miniruby --parser=prism -e "?���and 0"
-e: -e:1: syntax error found (SyntaxError)
> 1 | ?���and 0
    | ^ unexpected '?', ignoring it
```

|          |parse.y|Prism|
|----------|-------|-----|
|`?aand 0` |   x   |  x  |
|`?���and 0`|       |  x  |




-- 
https://bugs.ruby-lang.org/
 ______________________________________________
 ruby-core mailing list -- ruby-core@ml.ruby-lang.org
 To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org
 ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/