Exception thrown for lapack::potrf call

[tdot]

Unable to identify why the following code is throwing the exception.  The code is shown below. The debugging back trace is provided in attached file.  Any ideas/help welcome and appreciated.

The following code produces a SIGABORT for the lapack::potrf call

        int64_t nnn = numFeeds * numFeeds;

        std::int64_t scratchSzF = lapack::potrf_scratchpad_size<std::complex<double>>(_queue, uplo::lower, nnn, nnn);

// 0 will be returned if host is CPU, set it to arbitrary size.  Code is running on the host; unit test

        if (scratchSzF == 0) {

          scratchSzF = 10 * nnn;

        }

std::vector<std::complex<double>> input;

        input.clear();

        // numFeeds = 2;  WORKS, no exception thrown if using this input

        // input = {{69.51, 0}, {78.54, 8.3},

        //   {78.54, -8.3}, {89.75, 0}};

        numFeeds = 3; // exception thrown

        input = { {69.51, 0},     {78.54, 8.3},   {85.55, 17.8},

                    {78.54, -8.3},  {89.75, 0},     {98.82, 9.9},

                    {85.55, -17.8}, {98.82, -9.9},  {109.91, 0}};

        // numFeeds = 4; // exception thrown

        // input = {{69.51, 0}, {78.54, 8.3}, {85.55, 17.8}, {88.52, 29.7},

        //   {78.54, -8.3}, {89.75, 0}, {98.82, 9.9}, {103.61, 23},

        //   {85.55, -17.8}, {98.82, -9.9}, {109.91, 0}, {116.64, 13.9},

        //   {88.52, -29.7}, {103.61, -23}, {116.64, -13.9}, {125.55, 0}};

        std::vector<std::complex<double>> scratchPad(scratchSzF, {0.0});

        sycl::buffer<std::complex<double>, 1> inputBuff(input.data(), input.size());

        sycl::buffer<std::complex<double>, 1> scratchBuff(scratchPad.data(), scratchPad.size());

        // factorize THROWS here, Jenkins build reports this:

        // Assertion false failed (located in the cancel function, line in file: 226)

        // Detailed description: Unhandled exception from enqueue task is caught

        lapack::potrf(_queue, uplo::lower, numFeeds, inputBuff, numFeeds, scratchBuff, scratchSzF);

        _queue.wait_and_throw();

        // I added the following  2 lines instead of above.  same SIGABORT issue as above

        //_queue.wait();  

        //_queue.throw_asynchronous();

       // Also throws if all 'waits' are commented out

[Alex_Y_Intel]

Hi @tdot 
In order to investigate further, we need a complete reproducer that we can compile and execute to see the problem. Please provide a reproducer and exact commands used to reproduce the issue mentioned.