From: "ydah (Yudai Takada) via ruby-core" <ruby-core@...>
Date: 2025-01-05T00:17:01+00:00
Subject: [ruby-core:120481] [Ruby master Bug#21003] unexpected warning about ignored block

Issue #21003 has been updated by ydah (Yudai Takada).


memo) This does not occur even in Ruby 3.4.1 when `--parser=parse.y`.

```
��� ruby --parser=parse.y -e '$VERBOSE = true

def foo(*, &block) = block
def bar(buz, ...) = foo(buz, ...)

bar(:test) {}'

~
��� ruby --parser=parse.y -v -e '$VERBOSE = true

def foo(*, &block) = block
def bar(buz, ...) = foo(buz, ...)

bar(:test) {}'
ruby 3.4.1 (2024-12-25 revision 48d4efcb85) [arm64-darwin23]
```

----------------------------------------
Bug #21003: unexpected warning about ignored block
https://bugs.ruby-lang.org/issues/21003#change-111265

* Author: decuplet (Nikita Shilnikov)
* Status: Open
* ruby -v: ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [arm64-darwin24]
* Backport: 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONTNEED, 3.4: REQUIRED
----------------------------------------
I stumbled upon this during the upgrade to 3.4. Here's the minimal repro:
```ruby
$VERBOSE = true

def foo(*, &block) = block
def bar(buz, ...) = foo(buz, ...)

bar(:test) {}
```

It gives
```
ruby reproduce.rb
reproduce.rb:6: warning: the block passed to 'Object#bar' defined at reproduce.rb:4 may be ignored
```
where I believe it shouldn't. No warning reported if I change `def bar(buz, ...)` to `def bar(...)`.



-- 
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/