depgraph._resolve: use temp set for autounmask

diff --git a/pym/_emerge/depgraph.py b/pym/_emerge/depgraph.py
index 9fb0ceec8dd64c0bd834e07576200c0cb0ddcac6..4824a481d75162c7026ef2bacd5c5b6d64e94155 100644 (file)
--- a/pym/_emerge/depgraph.py
+++ b/pym/_emerge/depgraph.py
@@ -2291,18 +2291,22 @@ class depgraph(object):
                except self._unknown_internal_error:
                        return False, myfavorites
 
-               if set(self._dynamic_config.digraph).intersection( \
+               digraph_set = frozenset(self._dynamic_config.digraph)
+
+               if digraph_set.intersection(
                        self._dynamic_config._needed_unstable_keywords) or \
-                       set(self._dynamic_config.digraph).intersection( \
+                       digraph_set.intersection(
                        self._dynamic_config._needed_p_mask_changes) or \
-                       set(self._dynamic_config.digraph).intersection( \
+                       digraph_set.intersection(
                        self._dynamic_config._needed_use_config_changes) or \
-                       set(self._dynamic_config.digraph).intersection( \
+                       digraph_set.intersection(
                        self._dynamic_config._needed_license_changes) :
                        #We failed if the user needs to change the configuration
                        self._dynamic_config._success_without_autounmask = True
                        return False, myfavorites
 
+               digraph_set = None
+
                if self._rebuild.trigger_rebuilds():
                        backtrack_infos = self._dynamic_config._backtrack_infos
                        config = backtrack_infos.setdefault("config", {})