From: nobu@...
Date: 2019-06-29T00:52:38+00:00
Subject: [ruby-core:93417] [Ruby trunk Bug#15965] String#grapheme_clusters does not work with wide encodings

Issue #15965 has been reported by nobu (Nobuyoshi Nakada).

----------------------------------------
Bug #15965: String#grapheme_clusters does not work with wide encodings
https://bugs.ruby-lang.org/issues/15965

* Author: nobu (Nobuyoshi Nakada)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.4: DONTNEED, 2.5: REQUIRED, 2.6: REQUIRED
----------------------------------------
```
$ ruby2.5 -v -e 'p "abc".encode("UTF-16BE").grapheme_clusters'
ruby 2.5.5p157 (2019-03-15 revision 67260) [x86_64-darwin18]
[]

$ ruby2.6 -v -e 'p "abc".encode("UTF-16BE").grapheme_clusters'
ruby 2.6.3p62 (2019-04-16 revision 67580) [x86_64-darwin18]
[]

$ ruby -v -e 'p "abc".encode("UTF-16BE").grapheme_clusters'
ruby 2.7.0dev (2019-06-28T03:02:33Z master ff7f71b288) [x86_64-darwin18]
[]
```



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