--- rpl/src/instructions_r6.c	2018/05/30 09:27:37	1.71
+++ rpl/src/instructions_r6.c	2019/02/11 09:45:51	1.76
@@ -1,7 +1,7 @@
 /*
 ================================================================================
-  RPL/2 (R) version 4.1.29
-  Copyright (C) 1989-2018 Dr. BERTRAND Joël
+  RPL/2 (R) version 4.1.31
+  Copyright (C) 1989-2019 Dr. BERTRAND Joël
 
   This file is part of RPL/2.
 
@@ -346,8 +346,14 @@ instruction_recv(struct_processus *s_eta
 			return;
 		}
 
+		if (pthread_mutex_lock(&mutex_sigaction) != 0)
+		{
+			(*s_etat_processus).erreur_systeme = d_es_processus;
+			return;
+		}
+
 		action.sa_handler = SIG_IGN;
-		action.sa_flags = SA_ONSTACK;
+		action.sa_flags = 0;
 
 		if (sigaction(SIGPIPE, &action, &registre) != 0)
 		{
@@ -370,6 +376,7 @@ instruction_recv(struct_processus *s_eta
 				profilage(s_etat_processus, NULL);
 			}
 
+			pthread_mutex_unlock(&mutex_sigaction);
 			(*s_etat_processus).erreur_systeme = d_es_signal;
 			return;
 		}
@@ -380,6 +387,7 @@ instruction_recv(struct_processus *s_eta
 			if (sem_post((*s_etat_processus).semaphore_fork) != 0)
 #		endif
 		{
+			pthread_mutex_unlock(&mutex_sigaction);
 			(*s_etat_processus).erreur_systeme = d_es_processus;
 			return;
 		}
@@ -404,6 +412,7 @@ instruction_recv(struct_processus *s_eta
 		{
 			if (errno != EINTR)
 			{
+				pthread_mutex_unlock(&mutex_sigaction);
 				(*s_etat_processus).erreur_systeme = d_es_processus;
 				return;
 			}
@@ -433,6 +442,12 @@ instruction_recv(struct_processus *s_eta
 			return;
 		}
 
+		if (pthread_mutex_unlock(&mutex_sigaction) != 0)
+		{
+			(*s_etat_processus).erreur_systeme = d_es_processus;
+			return;
+		}
+
 		if (pthread_mutex_unlock(&((*s_etat_processus).mutex_pile_processus))
 				!= 0)
 		{