From 43620a5f02f709a7d970b55cbec973b3bcbab35c Mon Sep 17 00:00:00 2001
From: manga_osyo <manga.osyo@gmail.com>
Date: Mon, 17 Jul 2023 04:55:41 +0900
Subject: [PATCH] Fix [nil] is passed to auto_indent_proc when exit with CTRL+d

Fix it https://github.com/ruby/reline/issues/556
---
 lib/reline/line_editor.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/reline/line_editor.rb b/lib/reline/line_editor.rb
index 7ad56a39f8..2c46b5cb71 100644
--- a/lib/reline/line_editor.rb
+++ b/lib/reline/line_editor.rb
@@ -1849,7 +1849,7 @@ def byte_pointer=(val)
   def whole_lines
     index = @previous_line_index || @line_index
     temp_lines = @buffer_of_lines.dup
-    temp_lines[index] = @line
+    temp_lines[index] = @line || ""
     temp_lines
   end