MPI_Info_dup: allocate info through ompi_info_allocate instead of OBJ_NEW

The call to ompi_info_allocate ensures that the ompi instance is properly
retained (similar to MPI_Info_create). The instance is then released in
MPI_Info_free.

Thanks to Lisandro Dalcin for reporting and providing an easy reproducer.

Signed-off-by: Joseph Schuchart <[email protected]>

Author: devreal

ompi/mpi/c/info_dup.c

@@ -75,7 +75,7 @@ int MPI_Info_dup(MPI_Info info, MPI_Info *newinfo) {
         }
     }
 
-    *newinfo = OBJ_NEW(ompi_info_t);
+    *newinfo = ompi_info_allocate();
     if (NULL == *newinfo) {
         return OMPI_ERRHANDLER_NOHANDLE_INVOKE(MPI_ERR_NO_MEM,
                                       FUNC_NAME);