[Bug 57298] New: Falcosoft's Soundfont Midi Player: crashes on startup with Wine 9.19

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57298

Bug ID: 57298
           Summary: Falcosoft's Soundfont Midi Player: crashes on startup
                    with Wine 9.19
           Product: Wine
           Version: 9.19
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

After upgrading to Wine 9.19, Falcosoft's Soundfont Midi Player will crash on
startup (using a fresh new WINEPREFIX). The error is:

Fatal glibc error: malloc.c:4376 (_int_malloc): assertion failed: (unsigned
long) (size) >= (unsigned long) (nb)

If I use an old WINEPREFIX instead, the software will crash not immediately but
after playing a few seconds of a MIDI file. The error is:

munmap_chunk(): invalid pointer

After downgrading to Wine 9.18, the software will run correctly, regardless of
whether using a new WINEPREFIX or an old one. I didn't manage to compile Wine
from source successfully, so I haven't done a bisection yet.

32-bit version of Falcosoft's Soundfont Midi Player 6.4 can be downloaded at
https://falcosoft.hu/midiplayer_64.zip (PS: the suffix 64 means Version 6.4;
64-bit version won't launch with Wine from the beginning.)

SHA1: 3a3e64570896982d28666532211cf21555fd84e1

System information
Operating System: Arch Linux 
KDE Plasma Version: 6.2.0
KDE Frameworks Version: 6.6.0
Qt Version: 6.7.3
Kernel Version: 6.11.2-arch1-1 (64-bit)
Graphics Platform: Wayland