diff -rupN ceres-solver-1.13.0/internal/ceres/compressed_row_sparse_matrix.cc ceres-solver-1.13.0-new/internal/ceres/compressed_row_sparse_matrix.cc

--- ceres-solver-1.13.0/internal/ceres/compressed_row_sparse_matrix.cc	2017-08-03 09:10:55.000000000 +0200

+++ ceres-solver-1.13.0-new/internal/ceres/compressed_row_sparse_matrix.cc	2018-07-28 22:31:51.989682309 +0200

@@ -196,6 +196,11 @@ CompressedRowSparseMatrix* CompressedRow

   CompressedRowSparseMatrix* output =

       new CompressedRowSparseMatrix(num_rows, num_cols, input.num_nonzeros());

+  if (num_rows == 0) {

+    // No data to copy.

+    return output;

+  }

+

   // Copy the contents of the cols and values array in the order given

   // by index and count the number of entries in each row.

   int* output_rows = output->mutable_rows();