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From: "Earlopain (Earlopain _) via ruby-core" <ruby-core@ml.ruby-lang.org>
To: ruby-core@ml.ruby-lang.org
Cc: "Earlopain (Earlopain _)" <noreply@ruby-lang.org>
Subject: [ruby-core:120738] [Ruby master Bug#21048] [Prism] rescue in modifier form with condition behaves differently
Date: Sun, 19 Jan 2025 13:31:04 +0000 (UTC)	[thread overview]
Message-ID: <redmine.issue-21048.20250119133103.53314@ruby-lang.org> (raw)
In-Reply-To: <redmine.issue-21048.20250119133103.53314@ruby-lang.org>

Issue #21048 has been reported by Earlopain (Earlopain _).

----------------------------------------
Bug #21048: [Prism] rescue in modifier form with condition behaves differently
https://bugs.ruby-lang.org/issues/21048

* Author: Earlopain (Earlopain _)
* Status: Open
* ruby -v: 3.4.1
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
With the following code there is a discrepancy in how prism and parse.y consider precedence:

```rb
$called = false
def foo
  $called = true
end

foo rescue nil if false

puts "Called: #{$called}"
```

Prism interprets it as `(foo rescue nil) if false`, not calling the method. `parse.y` does `foo rescue (nil if false)` since at least Ruby 2.0

```sh
$ ruby -v
ruby 3.5.0dev (2025-01-19T12:44:20Z master f27ed98eff) +PRISM [x86_64-linux]

$ ruby code.rb
Called: true

$ ruby --parser=parse.y code.rb
Called: false
```



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       reply	other threads:[~2025-01-19 13:31 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-01-19 13:31 Earlopain (Earlopain _) via ruby-core [this message]
2025-01-20  5:01 ` [ruby-core:120741] " nobu (Nobuyoshi Nakada) via ruby-core
2025-01-20  6:41 ` [ruby-core:120742] " Earlopain (Earlopain _) via ruby-core
2025-01-21 18:23 ` [ruby-core:120751] " tenderlovemaking (Aaron Patterson) via ruby-core
2025-01-22 20:48 ` [ruby-core:120761] " kddnewton (Kevin Newton) via ruby-core
2025-02-14  5:08 ` [ruby-core:121019] " k0kubun (Takashi Kokubun) via ruby-core

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