_LibGraphNode: re-use the _key attribute

This allows us to avoid repeating any previous stat calls, which helps
to avoid potential race conditions due to inconsistent stat results
when the file system is being modified concurrently.

1 files changed, 10 insertions, 3 deletions

diff --git a/pym/portage/util/_dyn_libs/LinkageMapELF.py b/pym/portage/util/_dyn_libs/LinkageMapELF.py
index fe86a7a89..fef75b62c 100644
--- a/pym/portage/util/_dyn_libs/LinkageMapELF.py
+++ b/pym/portage/util/_dyn_libs/LinkageMapELF.py
@@ -60,7 +60,7 @@ class LinkageMapELF(object):
 
 		"""Helper class used as _obj_properties keys for objects."""
 
-		__slots__ = ("__weakref__", "_key")
+		__slots__ = ("_key",)
 
 		def __init__(self, obj, root):
 			"""
@@ -135,8 +135,15 @@ class LinkageMapELF(object):
 	class _LibGraphNode(_ObjectKey):
 		__slots__ = ("alt_paths",)
 
-		def __init__(self, obj, root):
-			LinkageMapELF._ObjectKey.__init__(self, obj, root)
+		def __init__(self, key):
+			"""
+			Create a _LibGraphNode from an existing _ObjectKey.
+			This re-uses the _key attribute in order to avoid repeating
+			any previous stat calls, which helps to avoid potential race
+			conditions due to inconsistent stat results when the
+			file system is being modified concurrently.
+			"""
+			self._key = key._key
 			self.alt_paths = set()
 
 		def __str__(self):