mistranslation: 0.973
device: 0.874
instruction: 0.829
semantic: 0.783
graphic: 0.731
network: 0.566
boot: 0.523
other: 0.459
socket: 0.420
vnc: 0.347
KVM: 0.267
assembly: 0.098

Wrong error log when drive is specified qcow but qcow2 image file used.

On archlinux qemu version 4.0.0 when I type:

$ qemu-system-x86_64 -drive format=qcow,file=image.qcow2 ...

I get this output in stderr 

qemu-system-x86_64 -drive format=qcow,file=image.qcow2 ...: Unsupported qcow version 3

image.qcow2 is a qcow2 image created by qemu-img. error states that problem is with lack support with qcow3 format but real problem is that foramt=qcow is wrong option.

Fix has been included here:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=197bfa7da7c8eeb39aa5