Fix for group output memory leak, bug #27104. This happens when an internal node...

diff --git a/source/blender/blenkernel/intern/node.c b/source/blender/blenkernel/intern/node.c
index 18268d72609268c1ba55e43eb43f2416f1152f17..fed982a8f1d6d0667a2edfb41aec3dd79fac58f9 100644 (file)
--- a/source/blender/blenkernel/intern/node.c
+++ b/source/blender/blenkernel/intern/node.c
@@ -1997,11 +1997,23 @@ static void node_group_execute(bNodeStack *stack, void *data, bNode *gnode, bNod
        if (ntree->type==NTREE_COMPOSIT) {
                bNodeSocket *sock;
                bNodeStack *ns;
+               
+               /* clear hasoutput on all local stack data,
+                * only the group output will be used from now on
+                */
+               for (node=ntree->nodes.first; node; node=node->next) {
+                       for (sock=node->outputs.first; sock; sock=sock->next) {
+                               if (sock->stack_type==SOCK_STACK_LOCAL) {
+                                       ns= get_socket_stack(stack, sock, in);
+                                       ns->hasoutput = 0;
+                               }
+                       }
+               }
+               /* use the hasoutput flag to tag external sockets */
                for (sock=ntree->outputs.first; sock; sock=sock->next) {
-                       /* use the hasoutput flag to tag external sockets */
                        if (sock->stack_type==SOCK_STACK_LOCAL) {
                                ns= get_socket_stack(stack, sock, in);
-                               ns->hasoutput = 0;
+                               ns->hasoutput = 1;
                        }
                }
                /* now free all stacks that are not used from outside */
@@ -2009,11 +2021,9 @@ static void node_group_execute(bNodeStack *stack, void *data, bNode *gnode, bNod
                        for (sock=node->outputs.first; sock; sock=sock->next) {
                                if (sock->stack_type==SOCK_STACK_LOCAL ) {
                                        ns= get_socket_stack(stack, sock, in);
-                                       if (ns->hasoutput!=0 && ns->data) {
+                                       if (ns->hasoutput==0 && ns->data) {
                                                free_compbuf(ns->data);
                                                ns->data = NULL;
-                                               /* reset the flag */
-                                               ns->hasoutput = 1;
                                        }
                                }
                        }