X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/fdc1a282a7200e7131298083d6dd41f6aa8beb89..8802406ce606cc44533b47d4c6f9d3f58a4bdfde:/src/simix/smx_user.c

diff --git a/src/simix/smx_user.c b/src/simix/smx_user.c
index bcc6ba83c1..a4453a8cbd 100644
--- a/src/simix/smx_user.c
+++ b/src/simix/smx_user.c
@@ -760,9 +760,11 @@ void simcall_comm_send(smx_rdv_t rdv, double task_size, double rate,
 
   if (MC_is_active()) {
     /* the model-checker wants two separate simcalls */
-    smx_action_t comm = simcall_comm_isend(rdv, task_size, rate,
+    smx_action_t comm = NULL; /* MC needs the comm to be set to NULL during the simcall */
+    comm = simcall_comm_isend(rdv, task_size, rate,
         src_buff, src_buff_size, match_fun, NULL, data, 0);
     simcall_comm_wait(comm, timeout);
+    comm = NULL;
   }
   else {
     simcall_BODY_comm_send(rdv, task_size, rate, src_buff, src_buff_size,
@@ -801,9 +803,11 @@ void simcall_comm_recv(smx_rdv_t rdv, void *dst_buff, size_t * dst_buff_size,
 
   if (MC_is_active()) {
     /* the model-checker wants two separate simcalls */
-    smx_action_t comm = simcall_comm_irecv(rdv, dst_buff, dst_buff_size,
+    smx_action_t comm = NULL; /* MC needs the comm to be set to NULL during the simcall */
+    comm = simcall_comm_irecv(rdv, dst_buff, dst_buff_size,
         match_fun, data);
     simcall_comm_wait(comm, timeout);
+    comm = NULL;
   }
   else {
     simcall_BODY_comm_recv(rdv, dst_buff, dst_buff_size,