as of 2013-10-072013-10-07

1 files changed, 3 insertions, 1 deletions

diff --git a/pcb.c b/pcb.c
index 8cffe3f..8f4034a 100644
--- a/pcb.c
+++ b/pcb.c
@@ -146,7 +146,9 @@ int insert_pcb(pcb **queue, pcb * addr, int method) {
 	  current->next = addr;

 	  addr->next = one_after;

 	  addr->prev = current;

-	  one_after->prev = addr;

+	  if (one_after != NULL) {

+		one_after->prev = addr;

+	  }

 	} else {

 

 	  // otherwise, put it at the head