[ruby-core:115384] [Ruby master Bug#18966] Strange behavior when numbered parameters and method definition are both used in a block

Issue #18966 has been updated by fcheung (Frederick Cheung).


Ruby 3.2.2 exhibits the same behaviour as above but on master ( as of b1f345b1 ) all of these now evaluate to 'a'

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Bug #18966: Strange behavior when numbered parameters and method definition are both used in a block
https://bugs.ruby-lang.org/issues/18966#change-105320

* Author: tompng (tomoya ishida)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.2.0dev (2022-08-19T04:20:20Z :detached: 17d0e5bee7) [x86_64-linux]
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
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~~~ruby
'a'.tap { p _1; def f()=42 } #=> "a"
'a'.tap { p _1; def f(a)=42 } #=> nil
'a'.tap { def f()=42; p _1 } #=> "a"
'a'.tap { def f(a)=42; p _1 } # Syntax Error -:1: ordinary parameter is defined
~~~




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