"ERROR: snd_rawmidi_read error: No such device" When disconnecting midi device

[not-my-username]

Tested versions

Reproducible all the way back to Godot_v3.1-stable_x11, when the MIDIDriver was added in this commit

Bug only effects Linux system where Godot uses the ALSA midi driver

System information

Godot v4.2.2.stable unknown - EndeavourOS #1 SMP PREEMPT_DYNAMIC Wed, 12 Jun 2024 20:17:17 +0000 - X11 - GLES3 (Compatibility) - NVIDIA GeForce RTX 3060 (nvidia; 550.90.07) - Intel(R) Xeon(R) CPU E3-1271 v3 @ 3.60GHz (8 Threads)

Issue description

After opening midi ports using OS.open_midi_inputs() then disconnecting a midi device, the following error will be spammed in the terminal and editor debugger tab

ERROR: snd_rawmidi_read error: No such device
   at: read_in (drivers/alsamidi/midi_driver_alsamidi.cpp:147)

Also tested on Godot v4.2.2.stable - macOS 11.7.10 - GLES3 (Compatibility) - Intel Iris OpenGL Engine - Intel(R) Core(TM) i5-4278U CPU @ 2.60GHz (4 Threads)
With no issue, so this appears to only affect the ALSA midi driver

Steps to reproduce

Run the project below, or use the code:

func _ready() -> void:
	OS.open_midi_inputs()

Then disconnect a midi device from you system

Minimal reproduction project (MRP)

v4.2.2.stable: Midi Device Disconnect Error.zip