There is a BIG BIG comment saying that the pipeline should be the last field in the structure ... Then the convertor have to be placed before ...

This commit was SVN r5979.

src/mca/pml/ob1/pml_ob1_recvreq.h

@@ -32,13 +32,13 @@ struct  mca_pml_ob1_recv_request_t {
     size_t req_bytes_received;
     size_t req_bytes_delivered;
 
+    ompi_convertor_t req_convertor;
     /* note that we allocate additional space for the recv
      * request to increase the array size based on run-time
      * parameters for the pipeline depth. So... this MUST be
      * the last element of this struct.
     */
     mca_bmi_base_descriptor_t *req_pipeline[1];
-    ompi_convertor_t req_convertor;
 };
 typedef struct mca_pml_ob1_recv_request_t mca_pml_ob1_recv_request_t;