Fix return on size mismatch in Barrier (#489)

TODO: Check reason of mismtach

Authors:
  - Hugo Linsenmaier (https://github.com/hlinsen)

Approvers:
  - Chris Maes (https://github.com/chris-maes)

URL: #489

Author: hlinsen

cpp/src/dual_simplex/sparse_cholesky.cuh

@@ -498,7 +498,7 @@ class sparse_cholesky_cudss_t : public sparse_cholesky_base_t<i_t, f_t> {
     auto d_nnz = Arow.row_start.element(Arow.m, Arow.row_start.stream());
     if (nnz != d_nnz) {
       settings_.log.printf("Error: nnz %d != A_in.col_start[A_in.n] %d\n", nnz, d_nnz);
-      exit(1);
+      return -1;
     }
 
     CUDSS_CALL_AND_CHECK(
@@ -568,7 +568,7 @@ class sparse_cholesky_cudss_t : public sparse_cholesky_base_t<i_t, f_t> {
 #endif
     if (A_in.n != n) {
       printf("Analyze input does not match size %d != %d\n", A_in.n, n);
-      exit(1);
+      return -1;
     }
 
     nnz = A_in.col_start[A_in.n];
@@ -669,7 +669,7 @@ class sparse_cholesky_cudss_t : public sparse_cholesky_base_t<i_t, f_t> {
     if (nnz != A_in.col_start[A_in.n]) {
       settings_.log.printf(
         "Error: nnz %d != A_in.col_start[A_in.n] %d\n", nnz, A_in.col_start[A_in.n]);
-      exit(1);
+      return -1;
     }
 
     CUDA_CALL_AND_CHECK(
@@ -741,11 +741,11 @@ class sparse_cholesky_cudss_t : public sparse_cholesky_base_t<i_t, f_t> {
     handle_ptr_->get_stream().synchronize();
     if (static_cast<i_t>(b.size()) != n) {
       settings_.log.printf("Error: b.size() %d != n %d\n", b.size(), n);
-      exit(1);
+      return -1;
     }
     if (static_cast<i_t>(x.size()) != n) {
       settings_.log.printf("Error: x.size() %d != n %d\n", x.size(), n);
-      exit(1);
+      return -1;
     }
 
     CUDSS_CALL_AND_CHECK(