class BugTest(models.Model):
    _name = "bug.test"
    something = fields.Char(compute="_compute_something", inverse="_inverse_something")
    something_else = fields.Char()

    @api.multi
    @api.depends("something_else")
    def _compute_something(self):
        for s in self:
            s.something = s.something_else

    @api.multi
    def _inverse_something(self):
        for s in self:
            s.something_else = s.something

    @api.model
    def _test_inverse_new(self):
        a = self.new({"something": "Will you find me?"})
        if a.something != a.something_else:
            raise ValidationError("Bugged!")