mp.add_forced_key_binding() can't overwrite MBTN_*_DBL key in input.conf

[verygoodlee]

Important Information

• mpv version

mpv v0.37.0-90-g9b001b44 Copyright © 2000-2023 mpv/MPlayer/mplayer2 projects
 built on Dec 13 2023 00:36:31
libplacebo version: v6.338.0-62-g52314e0-dirty
FFmpeg version: N-112963-g03ac6aa62
FFmpeg library versions:
   libavutil       58.32.100
   libavcodec      60.35.100
   libavformat     60.18.100
   libswscale      7.6.100
   libavfilter     9.14.100
   libswresample   4.13.100

• Windows Version
  Win10 22H2
• Source of the mpv binary
  https://github.com/shinchiro/mpv-winbuild-cmake/releases/tag/20231213

Reproduction steps

bind MBTN_*_DBL key in input.conf, and force bind same key in test.lua

# input.conf
MBTN_LEFT_DBL show-text "left_dbl input.conf"
MBTN_RIGHT_DBL show-text "right_dbl input.conf"

-- test.lua
mp.add_forced_key_binding("MBTN_LEFT_DBL", "MBTN_LEFT_DBL", function() 
    mp.commandv("show-text", "left_dbl test.lua")
end)
mp.add_forced_key_binding("MBTN_RIGHT_DBL", "MBTN_RIGHT_DBL", function() 
    mp.commandv("show-text", "right_dbl test.lua")
end)

Expected behavior

show "left_dbl test.lua" and "right_dbl test.lua"

Actual behavior

show "left_dbl input.conf" and "right_dbl input.conf"

Log file

log.txt

[guidocella]

Related to #11154 and fixed by adding mp.add_key_binding("mouse_move", function() end), but MBTN_RIGHT_DBL also not being rebindable if it's in input.conf is a newly discovered bug.

Edit: actually this was already noticed in the last comment: "The builtin keybindings have a MBTN_LEFT_DBL binding, but not one for MBTN_RIGHT_DBL, which is why it works fine for the right mouse button."