diffvg: CUDA Runtime Error: an illegal memory access was encountered

Hi, I encountered an error when running apps/single_curve_sdf_trans.py with GPU.

~/diffvg/apps$ CUDA_VISIBLE_DEVICES=1 python single_curve_sdf_trans.py 
CUDA Runtime Error: an illegal memory access was encountered at ~/diffvg/diffvg.cpp:1631

When this error occurred, the terminal hangs.

    // Clean up weight image
    if (scene->use_gpu) {
#ifdef __CUDACC__
        checkCuda(cudaFree(weight_image)); <--------------error occurred to this line
#else
        assert(false);
#endif
    } else {
        free(weight_image);
    }