communicator cannot be changed once initialized. So MPI scope of Vector never changes.

Author: dreamer2368

lib/linalg/Vector.cpp

@@ -114,9 +114,9 @@ Vector&
 Vector::operator = (
     const Vector& rhs)
 {
+    CAROM_VERIFY(d_comm == rhs.getComm());
     d_distributed = rhs.d_distributed;
     d_num_procs = rhs.d_num_procs;
-    d_comm = rhs.getComm();
     setSize(rhs.d_dim);
     memcpy(d_vec, rhs.d_vec, d_dim*sizeof(double));
     return *this;

lib/linalg/Vector.h

@@ -32,7 +32,7 @@ class Vector
 public:
     /**
      * @brief Constructor creating a Vector with uninitialized values and size.
-     * 
+     *
      * @param[in] comm MPI communicator of the processors that own this Vector.
      */
     Vector(MPI_Comm comm = MPI_COMM_WORLD);
@@ -817,8 +817,9 @@ class Vector
 
     /**
      * @brief MPI communicator of the processors that own this Vector.
+     * Cannot change once initialized.
      */
-    MPI_Comm d_comm;
+    const MPI_Comm d_comm;
 };
 
 /**