[Bug 51671] New: Random Dungeon: Can't show load screen.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51671

Bug ID: 51671
           Summary: Random Dungeon: Can't show load screen.
           Product: Wine
           Version: 6.15
          Hardware: x86-64
               URL: https://web.archive.org/web/20210608124325if_/http://f
                    tp.vector.co.jp/59/61/3173/RandomdungeonVer170.zip
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winsock
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: Ubuntu

Created attachment 70546
  --> https://bugs.winehq.org/attachment.cgi?id=70546
Errno::ENOTSOCK occurred

Random Dungeon (ja:らんだむダンジョン[1]) is a dungeon exploring game made with RPG
Tkool VX.
It works well on Wine 6.0.1. However, on Wine 6.15, we can't load the game
anymore.
When I choose "コンティニュー" (continue) on the title screen, it shows an error
message (see attachment).

It might be common among RPG Tkool VX Runtime and RPG Maker VX Runtime.

Steps to reproduce:
  1. Download RPG Tkool VX runtime, vx_rtp202.zip from [2].
     SHA1(vx_rtp202.zip) = 351b4e528dc6ed4ed9988f0a636da6b1df48d6f2
  2. unzip vx_rtp202.zip
  3. cd RPGVX_RTP202
  4. Install RPG Tkool VX runtime, i.e. LANG=ja_JP.UTF-8 wine setup.exe, and
     follow the setup wizard.
  5. Download Random Dungeon Ver.1.70, RandomdungeonVer170.zip.
     SHA1(RandomdungeonVer170.zip) = 718599f84995878d6b82c93380035169543de866
  6. unzip RandomdungeonVer170.zip
  7. cd RandodungeonVer170
  8. touch Save1.rvdata
  9. LANG=ja_JP.UTF-8 wine Game.exe
 10. On the title screen, move the cursor with arrow keys, focus "コンティニュー"
     (continue) and hit the [Enter].

Expected result:
  It shows load screen. You can choose a file to load.

Actual result:
  It shows a message box with the following message and will terminate after
clicking [OK].
  スクリプト 'Window_SaveFile' の 51 行目で Errno::ENOTSOCK が発生しました。
  (translation: Errno::ENOTSOCK occurred in script 'Window_SaveFile' at line
51.)
  See the attachment for details.

[1] http://hamusuta.blog-rpg.com/Entry/9/
[2] https://tkool.jp/products/rtp/vx_rtp202.zip