Pi 4B crashes if trying to attach a listener to all GPIO pins

[lukehutch]

This piece of code crashes the Pi 4B:

for (int pin = 0; pin < 31; pin++) {
    try {
        int pinNum = pin;
        DigitalInput digitalInput = Bonnet.pi4j
                .create(DigitalInput.newConfigBuilder(Bonnet.pi4j).id("gpio-pin-" + pin).name("Pin #" + pin)
                        .address(pin).pull(PullResistance.PULL_UP).build());
        digitalInput.addListener(new DigitalStateChangeListener() {
            @Override
            public void onDigitalStateChange(DigitalStateChangeEvent event) {
                System.out.println("GPIO pin " + pinNum + " state change");
            }
        });
    } catch (Exception e) {
        System.err.println("Could not set up digital input " + pin + ": " + e);
    }
}

[lukehutch]

I narrowed it down -- it's pin numbers 28 and 29 that cause the crash, even with nothing plugged into the GPIO header. The Pi locks up hard, and has to be power cycled.