MutableSlices failing after dealloc

buffer_slices2.cpp

#include <arrow/buffer.h>
#include <memory>
#include <iostream>

using namespace arrow;
using namespace std;

auto main(int argc, char* argv[]) -> int {
  int64_t size = 16;
  auto* memory = static_cast<uint8_t*>(malloc(size));
  shared_ptr<Buffer> mutable_slice;
  {
    // owns the memory, but just by convention
    auto mutable_buffer = make_shared<MutableBuffer>(memory, size);
    strcpy(reinterpret_cast<char*>(mutable_buffer->mutable_data()), "asdf");

    // doesn't own the memory nor has any insight in the parent
    mutable_slice = SliceMutableBuffer(mutable_buffer, 0, 2);
    cout << mutable_slice->data() << endl;

    // we since we own the memory we release it beforehand
    free(memory);
  }

  // no way of knowing if it is safe to do
  cout << mutable_slice->data() << endl;
}