device: 0.896
other: 0.812
mistranslation: 0.611
assembly: 0.575
network: 0.557
semantic: 0.506
graphic: 0.400
boot: 0.340
instruction: 0.332
KVM: 0.225
socket: 0.157
vnc: 0.138

Make -chardev, -serial and others accept stderr like they accept stdio
Additional information:
It's not clear what should happen when the guest tries to read from (instead of write to) the character device. On the other hand, I don't think the specific behavior matters very much.