https://git.ruby-lang.org/ruby.git/commit/?id=b0db420b0e

From b0db420b0e70753986d42579439acdd7ff0d9e95 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Fri, 24 Dec 2021 20:06:48 +0900
Subject: [ruby/reline] Escape newline(s) in prompt

https://github.com/ruby/reline/commit/b545459fca
---
 lib/reline/line_editor.rb                   |  2 +-
 test/reline/yamatanooroti/test_rendering.rb | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/lib/reline/line_editor.rb b/lib/reline/line_editor.rb
index ff5d160e645..5968af708bc 100644
--- a/lib/reline/line_editor.rb
+++ b/lib/reline/line_editor.rb
@@ -260,7 +260,7 @@ class Reline::LineEditor https://github.com/ruby/ruby/blob/trunk/lib/reline/line_editor.rb#L260
   end
 
   def reset_variables(prompt = '', encoding:)
-    @prompt = prompt
+    @prompt = prompt.gsub("\n", "\\n")
     @mark_pointer = nil
     @encoding = encoding
     @is_multiline = false
diff --git a/test/reline/yamatanooroti/test_rendering.rb b/test/reline/yamatanooroti/test_rendering.rb
index 0d1100f70cc..8ddf95c1ba3 100644
--- a/test/reline/yamatanooroti/test_rendering.rb
+++ b/test/reline/yamatanooroti/test_rendering.rb
@@ -1228,6 +1228,19 @@ begin https://github.com/ruby/ruby/blob/trunk/test/reline/yamatanooroti/test_rendering.rb#L1228
       EOC
     end
 
+    def test_prompt_with_newline
+      ENV['RELINE_TEST_PROMPT'] = "::\n> "
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
+      write("def hoge\n  3\nend")
+      close
+      assert_screen(<<~'EOC')
+        Multiline REPL.
+        ::\n> def hoge
+        ::\n>   3
+        ::\n> end
+      EOC
+    end
+
     def write_inputrc(content)
       File.open(@inputrc_file, 'w') do |f|
         f.write content
-- 
cgit v1.2.1


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