in packages/transform/src/emit.js [144:159]
Ep.clearPendingException = function(tryLoc, assignee) {
const t = util.getTypes();
t.assertLiteral(tryLoc);
let catchCall = t.callExpression(
this.contextProperty("catch", true),
[t.clone(tryLoc)]
);
if (assignee) {
this.emitAssign(assignee, catchCall);
} else {
this.emit(catchCall);
}
};