Hi, when I try to write a frame to the sd card or flash using ImageWriter.add_frame(img) the system crashes. When initializing the ImageWriter class I do see an empty file created on the sd or flash. I find a lot of opperations using the file system end up crashing. Please also see my post http://community.m5stack.com/topic/1528/error-loading-cascade-files-m5stickv.

When using Maixpy on the M5stickV I get a coredump when loading a .cascade file from flash or SD card. Even when I try to open the official openmv frontalface.cascade file the system crashes. I use the command "image.HaarCascade('/flash/frontalface.cascade')". Am I doing something wrong? Is there a fix? I've tried multiple firmware versions.

I've also posted the bug report on github