https://git.ruby-lang.org/ruby.git/commit/?id=5af602e4d4

From 5af602e4d48fd9951bcdd873b3e471ca4b123d45 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Fri, 10 Sep 2021 07:36:28 +0900
Subject: [ruby/reline] Erase lines correctly when dialog height is changed

https://github.com/ruby/reline/commit/68d2516551
---
 lib/reline/line_editor.rb | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/reline/line_editor.rb b/lib/reline/line_editor.rb
index 0a24a9d..b2f7728 100644
--- a/lib/reline/line_editor.rb
+++ b/lib/reline/line_editor.rb
@@ -764,10 +764,10 @@ class Reline::LineEditor https://github.com/ruby/ruby/blob/trunk/lib/reline/line_editor.rb#L764
       line_num.times do |i|
         Reline::IOGate.move_cursor_column(old_dialog.column)
         if visual_lines[start + i].nil?
-          s = ' ' * dialog.width
+          s = ' ' * old_dialog.width
         else
-          s = Reline::Unicode.take_range(visual_lines[start + i], old_dialog.column, dialog.width)
-          s = padding_space_with_escape_sequences(s, dialog.width)
+          s = Reline::Unicode.take_range(visual_lines[start + i], old_dialog.column, old_dialog.width)
+          s = padding_space_with_escape_sequences(s, old_dialog.width)
         end
         @output.write "\e[39m\e[49m#{s}\e[39m\e[49m"
         move_cursor_down(1) if i < (line_num - 1)
@@ -782,10 +782,10 @@ class Reline::LineEditor https://github.com/ruby/ruby/blob/trunk/lib/reline/line_editor.rb#L782
       line_num.times do |i|
         Reline::IOGate.move_cursor_column(old_dialog.column)
         if visual_lines[start + i].nil?
-          s = ' ' * dialog.width
+          s = ' ' * old_dialog.width
         else
-          s = Reline::Unicode.take_range(visual_lines[start + i], old_dialog.column, dialog.width)
-          s = padding_space_with_escape_sequences(s, dialog.width)
+          s = Reline::Unicode.take_range(visual_lines[start + i], old_dialog.column, old_dialog.width)
+          s = padding_space_with_escape_sequences(s, old_dialog.width)
         end
         @output.write "\e[39m\e[49m#{s}\e[39m\e[49m"
         move_cursor_down(1) if i < (line_num - 1)
-- 
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