A failure in writing is reported as success (!!)

[kparal]

I intentionally corrupted the written image during the writing process. I expected FMW to tell me that the writing process failed. Instead, it said that everything is fine and the image was successfully written!

Reproducer:

1. Start writing some image to a flash drive
2. After a few seconds of writing, use dd to write 10MB of zeroes at the beginning of the drive (sudo dd if=/dev/zero of=DEVICE bs=10M count=1)
3. Wait for the FMW writing to complete
4. See that the verification step ends immediately
5. See that you're reported a success

The only thing that FMW prints into console during the relevant phase is this:

W@75686ms: Couldn't send a notification: "org.freedesktop.DBus.Error.ServiceUnknown" - "org.freedesktop.DBus.Error.ServiceUnknown"

(I'm using a Flatpak version)

[kparal]

FMW 4.2 has the same issue.