Additionnal checks to help end-users.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@2851 48e7efb5-ca39-0410-a469-dd3cf9ba447f

diff --git a/src/msg/gos.c b/src/msg/gos.c
index a2fb719..892b523 100644 (file)
--- a/src/msg/gos.c
+++ b/src/msg/gos.c
@@ -745,6 +745,8 @@ MSG_error_t MSG_process_sleep(double nb_sec)
   m_process_t process = MSG_process_self();
   m_task_t dummy = NULL;
   simdata_task_t simdata = NULL;
+  
+  xbt_assert1(nb_sec>=0,"Invalid duration %g",nb_sec);
 
   CHECK_HOST();
   dummy = MSG_task_create("MSG_sleep", nb_sec, 0.0, NULL);