https://git.ruby-lang.org/ruby.git/commit/?id=0db9842b2c

From 0db9842b2ca85709424d6c9c1e11caeae30dfae7 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Thu, 24 Dec 2020 21:24:35 +0900
Subject: [ruby/reline] Delete the last char of a line by dw

This closes ruby/reline#229.

https://github.com/ruby/reline/commit/3f0ae689c4

diff --git a/lib/reline/unicode.rb b/lib/reline/unicode.rb
index 09aff69..b7cecfe 100644
--- a/lib/reline/unicode.rb
+++ b/lib/reline/unicode.rb
@@ -459,7 +459,7 @@ class Reline::Unicode https://github.com/ruby/ruby/blob/trunk/lib/reline/unicode.rb#L459
   end
 
   def self.vi_forward_word(line, byte_pointer)
-    if (line.bytesize - 1) > byte_pointer
+    if line.bytesize > byte_pointer
       size = get_next_mbchar_size(line, byte_pointer)
       mbchar = line.byteslice(byte_pointer, size)
       if mbchar =~ /\w/
@@ -474,7 +474,7 @@ class Reline::Unicode https://github.com/ruby/ruby/blob/trunk/lib/reline/unicode.rb#L474
     else
       return [0, 0]
     end
-    while (line.bytesize - 1) > (byte_pointer + byte_size)
+    while line.bytesize > (byte_pointer + byte_size)
       size = get_next_mbchar_size(line, byte_pointer + byte_size)
       mbchar = line.byteslice(byte_pointer + byte_size, size)
       case started_by
@@ -488,7 +488,7 @@ class Reline::Unicode https://github.com/ruby/ruby/blob/trunk/lib/reline/unicode.rb#L488
       width += get_mbchar_width(mbchar)
       byte_size += size
     end
-    while (line.bytesize - 1) > (byte_pointer + byte_size)
+    while line.bytesize > (byte_pointer + byte_size)
       size = get_next_mbchar_size(line, byte_pointer + byte_size)
       mbchar = line.byteslice(byte_pointer + byte_size, size)
       break if mbchar =~ /\S/
diff --git a/test/reline/test_key_actor_vi.rb b/test/reline/test_key_actor_vi.rb
index edef573..45a5327 100644
--- a/test/reline/test_key_actor_vi.rb
+++ b/test/reline/test_key_actor_vi.rb
@@ -1215,6 +1215,29 @@ class Reline::KeyActor::ViInsert::Test < Reline::TestCase https://github.com/ruby/ruby/blob/trunk/test/reline/test_key_actor_vi.rb#L1215
     assert_line('aaa ddd eee')
   end
 
+  def test_vi_delete_meta_with_vi_next_word_at_eol
+    input_keys("foo bar\C-[0w")
+    assert_byte_pointer_size('foo ')
+    assert_cursor(4)
+    assert_cursor_max(7)
+    assert_line('foo bar')
+    input_keys('w')
+    assert_byte_pointer_size('foo ba')
+    assert_cursor(6)
+    assert_cursor_max(7)
+    assert_line('foo bar')
+    input_keys('0dw')
+    assert_byte_pointer_size('')
+    assert_cursor(0)
+    assert_cursor_max(3)
+    assert_line('bar')
+    input_keys('dw')
+    assert_byte_pointer_size('')
+    assert_cursor(0)
+    assert_cursor_max(0)
+    assert_line('')
+  end
+
   def test_vi_delete_meta_with_vi_next_char
     input_keys("aaa bbb ccc ___ ddd\C-[02w")
     assert_byte_pointer_size('aaa bbb ')
-- 
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