This call is supposed to drop the temporary output collections if anything goes wrong in the command, but in some cases we don't reach there. In particular, I've reproduced a failure where this line can throw an exception due to a stale config. When that happens, the cleanup code doesn't run and the collection is left around.

To fix this, we should use a ScopeGuard to make sure we clean up the temporary collections if we exit the function due to an exception.