  We numerically calculate the spacetime describing the formation and
evaporation of a regular black hole in 2D dilaton gravity. The apparent
horizons evaporate smoothly in finite time to form a compact trapped region. We
nevertheless see rich dynamics; an anti-trapped region forms alongside the
black hole, and additional compact trapped and anti-trapped regions are formed
by backreaction effects as the mass radiates away. The spacetime is
asymptotically flat at future null infinity and is free of singularities and
Cauchy horizons. These results suggest that the evaporation of regular 2D black
holes is unitary.
