  The destruction of the event horizon of a nonsingular black hole, which is
not prevented by the weak cosmic censorship conjecture, might provide us the
possibility to access quantum regime of gravity inside black hole. We
investigate the possibility of overspinning a nonsingular rotating
quantum-corrected black hole by a test particle and a scalar field in this
paper, and analyse the effect of the quantum parameter on the destruction of
the event horizon. For the test particle injection, both extremal and
near-extremal black holes cannot be overspun due to the existence of the
quantum parameter. And the larger the quantum parameter the harder the black
hole to be overspun. It seems that the quantum parameter acts as a protector to
prevent the black hole to be destroyed. However, for the test scalar field
scattering, both extremal and near-extremal black holes can be destroyed. Due
to the loop quantum gravity correction, the angular velocity of the extremal
black hole shifts from that of the extremal Kerr black hole. This provides a
small range of wave modes to destroy the event horizon of the quantum-corrected
black hole.
