[ruby-core:95656] [Ruby master Feature#13083] {String|Symbol}#match{?} with nil returns falsy as Regexp#match{?} since ruby 3.0

Issue #13083 has been updated by shugo (Shugo Maeda).


matz (Yukihiro Matsumoto) wrote:
> Thank you for the input. If you can provide a more detailed situation, it would be better.

My situation is the same as Rafael's, and I fixed my code using the safe navigation operator:

  https://github.com/shugo/textbringer/commit/c859d13

Code like `/regex/ =~ str` has often been used when `str` may be `nil`, and such code has been rewritten using Regexp#match? after Ruby 2.4.
This change will break all such code.


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Feature #13083: {String|Symbol}#match{?} with nil returns falsy as Regexp#match{?} since ruby 3.0
https://bugs.ruby-lang.org/issues/13083#change-82444

* Author: kachick (Kenichi Kamiya)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
Just for consistency

* patch: https://github.com/ruby/ruby/pull/1506
* spec: https://github.com/ruby/spec/pull/380

Currently behaves as ( ruby --version: ruby 2.5.0dev (2016-12-28 trunk 57228) [x86_64-darwin16] )

~~~ ruby
'string'.__send__(:=~, nil) #=> nil
'string'.match(nil)         #=> TypeError: wrong argument type nil (expected Regexp)
'string'.match?(nil)        #=> TypeError: wrong argument type nil (expected Regexp)
:symbol.__send__(:=~, nil)  #=> nil
:symbol.match(nil)          #=> TypeError: wrong argument type nil (expected Regexp)
:symbol.match?(nil)         #=> TypeError: wrong argument type nil (expected Regexp)
/regex/.__send__(:=~, nil)  #=> nil
/regex/.match(nil)          #=> nil
/regex/.match?(nil)         #=> false
~~~


Expected to

~~~ruby
'string'.__send__(:=~, nil) #=> nil
'string'.match(nil)         #=> nil
'string'.match?(nil)        #=> false
:symbol.__send__(:=~, nil)  #=> nil
:symbol.match(nil)          #=> nil
:symbol.match?(nil)         #=> false
/regex/.__send__(:=~, nil)  #=> nil
/regex/.match(nil)          #=> nil
/regex/.match?(nil)         #=> false
~~~



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