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From: daniel@dan42.com
To: ruby-core@ruby-lang.org
Subject: [ruby-core:95670] [Ruby master Feature#16289] Reduce duplicated warnings for the change of Ruby 3 keyword arguments
Date: Mon, 04 Nov 2019 16:41:05 +0000 (UTC)	[thread overview]
Message-ID: <redmine.journal-82458.20191104164104.82f4a44502efdec5@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-16289.20191101032931@ruby-lang.org

Issue #16289 has been updated by Dan0042 (Daniel DeLorme).


> > If they only warn once, they are not that annoying, and people may be less inclined to fix the issue.
> 
> It's a warning about an upcoming incompatibility, once should be serious enough!

I think the issue is more that in a long-lived process you'll get only a few warnings in a large log, and it may be easy to miss unless you specifically grep for the warnings.

----------------------------------------
Feature #16289: Reduce duplicated warnings for the change of Ruby 3 keyword arguments
https://bugs.ruby-lang.org/issues/16289#change-82458

* Author: mame (Yusuke Endoh)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
## Problem

Currently, the interpreter emits 200 lines of warnings against the following program.

```ruby
def foo(**opt); end
100.times { foo({kw:1}) }
```

```
$ ./miniruby -e 'def foo(**opt); end; 100.times { foo({kw:1}) }'
-e:1: warning: The last argument is used as the keyword parameter
-e:1: warning: for `foo' defined here
-e:1: warning: The last argument is used as the keyword parameter
-e:1: warning: for `foo' defined here
-e:1: warning: The last argument is used as the keyword parameter
-e:1: warning: for `foo' defined here
...
```

In theory, the warnings are not harmful because they don't stop or interfere the execution.  But in practice, I'm afraid if they are annoying because they flush all console logs away.
I think that the warning is not needed if the call is already warned.


## Proposal

How about limiting the count of warnings to at most once for each pair of caller and callee?

I've created [a pull request](https://github.com/ruby/ruby/pull/2458).  It records all pairs of caller position and callee iseq when emitting a warning, and suppress the warning if the same pair of caller and callee is already warned.

What do you think?



-- 
https://bugs.ruby-lang.org/

  parent reply	other threads:[~2019-11-04 16:41 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <redmine.issue-16289.20191101032931@ruby-lang.org>
2019-11-01  3:29 ` [ruby-core:95627] [Ruby master Feature#16289] Reduce duplicated warnings for the change of Ruby 3 keyword arguments mame
2019-11-01  4:43   ` [ruby-core:95630] " Eric Wong
2019-11-01  4:38 ` [ruby-core:95629] " ruby-core
2019-11-01  7:03 ` [ruby-core:95631] " nobu
2019-11-01 13:26 ` [ruby-core:95634] " mame
2019-11-02  8:00 ` [ruby-core:95651] " mame
2019-11-02 12:56 ` [ruby-core:95653] " eregontp
2019-11-02 15:47 ` [ruby-core:95655] " ruby-core
2019-11-04 16:41 ` daniel [this message]
2019-11-05  9:35 ` [ruby-core:95692] " shevegen
2019-11-10 11:24 ` [ruby-core:95775] " eregontp
2019-11-10 22:20 ` [ruby-core:95780] " sam.saffron
2019-11-11  1:00 ` [ruby-core:95783] " sam.saffron
2019-11-29  8:12 ` [ruby-core:96025] " mame
2019-12-23  7:37 ` [ruby-core:96418] " ruby-core
2019-12-23 11:49 ` [ruby-core:96425] " mame
2019-12-23 12:51 ` [ruby-core:96427] " eregontp
2019-12-23 17:47 ` [ruby-core:96439] " merch-redmine
2019-12-23 21:49 ` [ruby-core:96441] " ruby-core
2019-12-24  7:06 ` [ruby-core:96452] " mame
2019-12-24  7:10 ` [ruby-core:96453] " matz
2019-12-24  7:23 ` [ruby-core:96455] " mame
2019-12-24  7:34 ` [ruby-core:96456] " mame

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