[ruby-core:108720] [Ruby master Bug#18769] StringIO#each hangs up on some input with `chomp: true`

Issue #18769 has been updated by jeremyevans0 (Jeremy Evans).


I've submitted a pull request to fix this: https://github.com/ruby/stringio/pull/30

----------------------------------------
Bug #18769: StringIO#each hangs up on some input with `chomp: true`
https://bugs.ruby-lang.org/issues/18769#change-97771

* Author: andrykonchin (Andrew Konchin)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.0.3
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
The mentioned StringIO method `#each` (as well as `#readlines` and `#each_line`) may hang up when passed a separator and `chomp: true`:

```ruby
require 'stringio'

StringIO.new('a||b||c').each("||", chomp: true) { |s| p s }

""
""
""
""
""
""
""
```

The same way behave other two methods:

```ruby
StringIO.new('a||b||c').readlines("||", chomp: true)
StringIO.new('a||b||c').each_line("||", chomp: true) { |s| p s }
```





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