--- rpl/src/instructions_s10.c	2013/05/22 09:05:20	1.75
+++ rpl/src/instructions_s10.c	2013/05/22 13:40:12	1.76
@@ -408,9 +408,21 @@ instruction_spawn(struct_processus *s_et
 	while((*s_argument_thread).thread_actif == d_faux)
 	{
 		scrutation_interruptions(s_etat_processus);
-		pthread_mutex_lock(&((*s_argument_thread).mutex));
+
+		if (pthread_mutex_unlock(&((*s_argument_thread).mutex)) != 0)
+		{
+			(*s_etat_processus).erreur_systeme = d_es_processus;
+			return;
+		}
+
 		nanosleep(&attente, NULL);
-		pthread_mutex_unlock(&((*s_argument_thread).mutex));
+
+		if (pthread_mutex_lock(&((*s_argument_thread).mutex)) != 0)
+		{
+			(*s_etat_processus).erreur_systeme = d_es_processus;
+			return;
+		}
+
 		INCR_GRANULARITE(attente.tv_nsec);
 	}