https://git.ruby-lang.org/ruby.git/commit/?id=ff43b0f2dd

From ff43b0f2ddce0b30071be83383e5d178141b2247 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Wed, 25 Aug 2021 17:22:23 +0900
Subject: [ruby/reline] Update dialog backup before clearing

https://github.com/ruby/reline/commit/a39e2c8813
---
 lib/reline/line_editor.rb | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/reline/line_editor.rb b/lib/reline/line_editor.rb
index 0966c19..40667d3 100644
--- a/lib/reline/line_editor.rb
+++ b/lib/reline/line_editor.rb
@@ -544,6 +544,13 @@ class Reline::LineEditor https://github.com/ruby/ruby/blob/trunk/lib/reline/line_editor.rb#L544
       @dialog_contents = @dialog_contents[0...DIALOG_HEIGHT] if @dialog_contents.size > DIALOG_HEIGHT
       @dialog_contents_width = @dialog_contents.map{ |c| calculate_width(c) }
     else
+      @dialog_lines_backup = {
+        lines: modify_lines(whole_lines),
+        line_index: @line_index,
+        first_line_started_from: @first_line_started_from,
+        started_from: @started_from,
+        byte_pointer: @byte_pointer
+      }
       clear_dialog
       @dialog_contents = nil
       return
-- 
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