Index: libsepol/src/expand.c
===================================================================
--- libsepol/src/expand.c	(revision 2950)
+++ libsepol/src/expand.c	(working copy)
@@ -90,6 +90,8 @@
 	}
 	if (!is_id_enabled(id, state->base, SYM_TYPES)) {
 		/* identifier's scope is not enabled */
+		INFO(state->handle, "type %s is skipped (s.value=%u primary=%u)",
+		     (char *)key, type->s.value, type->primary);
 		return 0;
 	}
 
@@ -516,6 +518,14 @@
 
 	new_alias->flags = alias->flags;
 
+	if (!new_alias->s.value) {
+		INFO(state->handle, "strange alias type : "
+		     "%s (a.value=%u, primary=%u, flavor=%u)"
+		     " => (a.value=%u, primary=%u, flavor=%u)",
+		     (char *) key, alias->s.value, alias->primary, alias->flavor,
+		     new_alias->s.value, new_alias->primary, new_alias->flavor);
+	}
+
 	ret = hashtab_insert(state->out->p_types.table,
 			     (hashtab_key_t) new_id,
 			     (hashtab_datum_t) new_alias);
Index: libsepol/src/write.c
===================================================================
--- libsepol/src/write.c	(revision 2950)
+++ libsepol/src/write.c	(working copy)
@@ -952,6 +952,12 @@
 
 	typdatum = (type_datum_t *) datum;
 
+	if (!typdatum->s.value) {
+		printf("%s: strange type %s (s.value=%u, primary=%u, flavor=%u)\n",
+		       __FUNCTION__, (char *)key, typdatum->s.value,
+		       typdatum->primary, typdatum->flavor);
+	}
+
 	len = strlen(key);
 	items = 0;
 	buf[items++] = cpu_to_le32(len);