#include <cstdio>

struct Member
{
    int value;
    bool valid{}; // <<<< Removing {} makes it work
};

class Wrapper
{
 public:
    __host__ __device__ Wrapper(){}
    __host__ __device__ explicit Wrapper(Member member) :
        member_(member)
    {}
    Member member_{};
};

__device__ inline Member makeMember(int const input)  //<<<<< Removing inline makes it work
{
    return Member{input, true};
}

__global__ void testKernel(int const input, Wrapper* const d_wrapper)
{
    auto const x = makeMember(input);
    *d_wrapper = Wrapper(x);
    printf("Wrapper member value: %d\n", d_wrapper->member_.value);
    printf("Member value: %d\n", x.value);
}

int main()
{
    Wrapper* d_wrapper{};
    cudaMalloc(&d_wrapper, sizeof(Wrapper));
    testKernel<<<1, 1>>>(123, d_wrapper);
    cudaDeviceSynchronize();
}