Hard fault reading input from keyboard

[FoamyGuy]

CircuitPython version and board name

Adafruit CircuitPython 9.2.4-274-g2af397ed1c on 2025-03-06; Adafruit Metro RP2350 with rp2350b
Board ID:adafruit_metro_rp2350

Code/REPL

import supervisor
import sys

while True:
    available = supervisor.runtime.serial_bytes_available
    if available:
        c = sys.stdin.read(available)
        print(c, end='')

Behavior

The code runs and waits until a key is pressed. Once a key is pressed the device reboots and there is this hardfault message in the serial console:

Running in safe mode! Not running saved code.

You are in safe mode because:
CircuitPython core code crashed hard. Whoops!
Hard fault: memory access or instruction error.
Please file an issue with your program at github.com/adafruit/circuitpython/issues.
Press reset to exit safe mode.

Description

No response

Additional information

Using this keyboard: https://www.adafruit.com/product/857

[FoamyGuy]

There seems to be something specific about this keyboard that it doesn't like. I've tried the following and they all work with the same code on the same device:

• IOGear GKM561R https://iogear.com/products/gkm561r
• Logitech K400 https://www.logitech.com/en-us/shop/p/k400-plus-touchpad-keyboard
• Kinesis Advantage https://kinesis-ergo.com/support/advantage/