Queue.Empty is not an exception in python3 (Queue has been renamed to queue) Change-Id: I82555d96608094fa47990f888fd11663379547bc Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/40135 Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>