Repairing Lego minifigure torso cracks/damage
one thing that worked for me is to use a very small needle-nose plier or a tweezer to hold the torso from inside while pushing the crack apart (very carefully). now you can use a toothpick or a needle get a bit of superglue in the crack to fix it.

note that this just works for bigger cracks like the ones going up to the armpits.