Parametrized test crashes when calling virtual function

[Mirkopoj]

class Cont : public Stack {
public:
  StackableObject **stack;
  size_t count;
  Cont(int initial_capacity)
      : count(0), stack(new StackableObject *[initial_capacity]) {}
  ~Cont() { delete[] stack; }

  size_t read_count() const { return this->count; }

  virtual size_t get_count() const override { return this->count; }
  virtual bool push(StackableObject *const new_stackable) override {
    this->stack[this->count] = new_stackable;
    this->count++;
    return true;
  }
  virtual StackableObject *pop() override {
    this->count--;
    return this->stack[this->count];
  }
};

criterion::parameters<std::unique_ptr<Cont>> parameters;
ParameterizedTestParameters(params, cleanup) {
  parameters.push_back(std::make_unique<Cont>(2));
  std::cout << "parameters: " << &parameters << "\n";
  std::cout << "parameter 0: " << &(*parameters[0]) << "\n";
  std::cout << "parameter 0 get_count: " << (*parameters[0]).get_count()
            << "\n";
  return parameters;
}

ParameterizedTest(std::unique_ptr<Cont> &dyn_cont, params, cleanup) {
  std::cout << "dyn_cont: " << &dyn_cont << "\n";
  std::cout << "*dyn_cont: " << &(*dyn_cont) << "\n";
  int count = (*dyn_cont).count;
  printf("Parameters: (%d)\n", count);
  count = (*dyn_cont).read_count();
  printf("Parameters: (%d)\n", count);
  count = (*dyn_cont).get_count();
  printf("Parameters: (%d)\n", count);
}

new
new[]
parameters: 0x582ca41bf310
parameter 0: 0x4e91ec000038
parameter 0 get_count: 0
dyn_cont: 0x7aac42037280
*dyn_cont: 0x4e91ec000038
Parameters: (0)
Parameters: (0)
[----] src/tests/dynamic_mem.cpp:86: Unexpected signal caught below this line!
[FAIL] params::cleanup: CRASH!
[====] Synthesis: Tested: 1 | Passing: 0 | Failing: 1 | Crashing: 1 
delete[]
delete

I overwrote all allocations to use criterion's those news and deletes printed in the output show they get called, when accesing the count attribute, or reading it via a local method (read_count()) everything works, but when I call the get_count() virtual method I get a crash.