Executing OS.open_midi_inputs() crashes Godot

[qarmin]

Godot version:
Godot 3.2.4 rc 2

OS
Ubuntu 20.04 - Ubuntu 3.36 X11

Issue description:
Executing

func _process(_delta : float) -> void:
	if randi() % 2 == 0:
		print("Executing OS::open_midi_inputs")

		OS.open_midi_inputs()

crashes with backtrace(address sanitizer doesn't show anything)

Executing OS::open_midi_inputs
handle_crash: Program crashed with signal 11
Dumping the backtrace. Please include this when reporting the bug on https://github.com/godotengine/godot/issues
[1] godots() [0x172e07a] (/mnt/Miecz/godot3.2/platform/x11/crash_handler_x11.cpp:54)
[2] /lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7fc3f2fdd210] (??:0)
-- END OF BACKTRACE --
Aborted (core dumped)

[Ovnuniarchos]

Confirmed on commit 94a0fc4.
System: Debian SID

[waimus]

I also experienced crash simply by running OS.open_midi_inputs() with log:

handle_crash: Program crashed with signal 11
Dumping the backtrace. Please include this when reporting the bug on https://github.com/godotengine/godot/issues
[1] /lib/x86_64-linux-gnu/libc.so.6(+0x41950) [0x7fe672508950] (??:0)
-- END OF BACKTRACE --

The last change of AlsaMIDI driver (/drivers/alsamidi/midi_driver_alsamidi.cpp) was on commit 99fe462/direct link to file difference. So I tested one commit before 99fe462 that happened in the same day, which was commit c4a2fe9 and the OS.open_midi_input() is working fine.

Since commit 99fe462 is only modified the Alsa MIDI driver, the rest of CoreMIDI and WinMIDI driver does not affected. But I haven't got any confirmation or able to test if OS.open_midi_inputs() crashes on Mac and Windows.

Other than this report I am unable to figure out what other files that may be related to OS.open_midi_inputs().

[20kdc]

Issue still present in Godot 3.3.2.stable Linux 64-bit as gotten from itch.io

[aki-cat]

@akien-mga hey, I'm having this issue and just saw you merged a fix for 3.4
is there a current workaround for this on 3.3.2?

[qarmin]

No, you need to wait for 3.3.3 or compile it by yourself