ESP32-C6 Feather crashes and goes into safe mode when connecting to USB web workflow

[BlitzCityDIY]

CircuitPython version

Adafruit CircuitPython 9.1.3 on 2024-08-29; Adafruit Feather ESP32-C6 4MB Flash No PSRAM with ESP32C6

Code/REPL

import time
import board
import digitalio

led = digitalio.DigitalInOut(board.LED)
led.direction = digitalio.Direction.OUTPUT

while True:
    led.value = True
    time.sleep(0.5)
    led.value = False
    time.sleep(0.5)

Behavior

When running the blink code above, I try to initiate a connection with https://code-beta.circuitpython.org/ over USB. Once the board connects, the onboard LED stops blinking and I get this message in the serial console:

connected

soft reboot

Auto-reload is off.
Running in safe mode! Not running saved code.

You are in safe mode because:
CircuitPython core code crashed hard. Whoops!
Unable to allocate to the heap.
Please file an issue with your program at github.com/adafruit/circuitpython/issues.
Press reset to exit safe mode.

Press any key to enter the REPL. Use CTRL-D to reload.

Description

I came across this while testing fixes related to this issue. Mainly that when the board is running code that has a blocking time.sleep delay in the loop it seems to also block connecting to the web editor.

When I connected to the code editor after freshly installing CircuitPython, I was able to connect right away (running the default print("hello world"). After saving the blink code and then trying to reconnect to the editor, I hit the safe mode error. I've been able to repeat the safe mode error consistently.

Additional information

No response

[tannewt]

This works ok for me with the latest main. Can you reproduce it with an absolute newest build?

[BlitzCityDIY]

i just tested with absolute newest (Adafruit CircuitPython 9.2.0-alpha.2351-32-g28b593341c on 2024-09-11; Adafruit Feather ESP32-C6 4MB Flash No PSRAM with ESP32C6) and had the same safe mode error occur on https://code-beta.circuitpython.org/