Bug #20711: readline/reline duplicate display of prompt

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 3.3.3 (2024-06-12 revision f1c7b6f435) [x86_64-linux]
• Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: REQUIRED

[yogo1212 (Leon Busch-George)]

#!/usr/bin/env ruby

require 'readline'

prompt = "asdf: "
default = "true"

Readline.pre_input_hook = -> do
	Readline.insert_text "#{default}"
	Readline.redisplay
	Readline.pre_input_hook = nil
end

Readline.readline(prompt)

prompt: trueprompt:

the cursor sits at the right place (behind the 'e' in 'true'). inserting a backslash causes the line to be cleared and fixes the display.

expected display, correct in previous versions:

prompt: true

affected:

ruby 3.3.3 (2024-06-12 revision f1c7b6f435) [x86_64-linux] # from rbenv

unaffected:

ruby 3.0.7p220 (2024-04-23 revision 724a071175) [x86_64-linux] # RHEL 9
ruby 3.2.5 (2024-07-26 revision 31d0f1a2e7) [x86_64-linux] # Arch Linux package

[tompng (tomoya ishida)]

https://github.com/ruby/reline/pull/742 will fix it.

[yogo1212 (Leon Busch-George)]

tompng (tomoya ishida) wrote in #note-1:

https://github.com/ruby/reline/pull/742 will fix it.

Great - thanks :-)

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Closed
• Backport changed from 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN to 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: REQUIRED

https://github.com/ruby/ruby/pull/11558