Index: abstract.c
===================================================================
--- abstract.c	(revision 10094)
+++ abstract.c	(revision 10095)
@@ -33,6 +33,8 @@
 #include <librnd/core/compat_misc.h>
 #include <librnd/core/error.h>
 
+#include "hierarchy.h"
+
 #include "abstract.h"
 
 static const char *atype_names[] = {
@@ -100,6 +102,7 @@
 	htsp_init(&abs->nets, strhash, strkeyeq);
 	htsp_init(&abs->comps, strhash, strkeyeq);
 	htip_init(&abs->aid2obj, longhash, longkeyeq);
+	abs->hroot = csch_hlevel_new(NULL);
 	abs->next_aid = 1;
 }
 
@@ -107,6 +110,8 @@
 {
 	htsp_entry_t *e;
 
+	csch_hlevel_free_tree(abs->hroot);
+
 	for(e = htsp_first(&abs->nets); e != NULL; e = htsp_next(&abs->nets, e)) {
 		csch_anet_free_fields(e->value);
 		free(e->value); e->value = NULL;
@@ -120,6 +125,7 @@
 	htsp_uninit(&abs->nets);
 	htsp_uninit(&abs->comps);
 	htip_uninit(&abs->aid2obj);
+
 	memset(abs, 0, sizeof(csch_abstract_t));
 }