This fixes an issue that after changing backends (::set_backend), the session-transport was in inconsistent state. If it was rolling, it continued to roll with "stop" being unavailable.
44440f9316 Add new requirements from AudioEngine::stop to ::drop_backend
libs/ardour/audioengine.cc | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)