From 70e7107bfb01225c0aac74ce32f66b1c3b0d4d2d Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Wed, 14 Sep 2011 22:09:04 -0700
Subject: Fix multislot handling for depclean (bug #382823)

---
 pym/_emerge/depgraph.py                      | 18 ++++++++++++++----
 pym/portage/tests/resolver/test_multislot.py | 16 +++++++++++++++-
 2 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/pym/_emerge/depgraph.py b/pym/_emerge/depgraph.py
index 1e311e8f7..f25a22dea 100644
--- a/pym/_emerge/depgraph.py
+++ b/pym/_emerge/depgraph.py
@@ -3263,11 +3263,20 @@ class depgraph(object):
 		# satisfied rather than forcing a rebuild.
 		installed = pkg_type == 'installed'
 		if installed and not cpv_list and atom.slot:
+
+			if "remove" in self._dynamic_config.myparams:
+				# We need to search the portdbapi, which is not in our
+				# normal dbs list, in order to find the real SLOT.
+				portdb = self._frozen_config.trees[root_config.root]["porttree"].dbapi
+				db_keys = list(portdb._aux_cache_keys)
+				dbs = [(portdb, "ebuild", False, False, db_keys)]
+			else:
+				dbs = self._dynamic_config._filtered_trees[root_config.root]["dbs"]
+
 			for cpv in db.match(atom.cp):
 				slot_available = False
 				for other_db, other_type, other_built, \
-					other_installed, other_keys in \
-					self._dynamic_config._filtered_trees[root_config.root]["dbs"]:
+					other_installed, other_keys in dbs:
 					try:
 						if atom.slot == \
 							other_db.aux_get(cpv, ["SLOT"])[0]:
@@ -4064,11 +4073,12 @@ class depgraph(object):
 		"""
 		Select packages that are installed.
 		"""
-		vardb = self._dynamic_config._graph_trees[root]["vartree"].dbapi
-		matches = vardb.match_pkgs(atom)
+		matches = list(self._iter_match_pkgs(self._frozen_config.roots[root],
+			"installed", atom))
 		if not matches:
 			return None, None
 		if len(matches) > 1:
+			matches.reverse() # ascending order
 			unmasked = [pkg for pkg in matches if \
 				self._pkg_visibility_check(pkg)]
 			if unmasked:
diff --git a/pym/portage/tests/resolver/test_multislot.py b/pym/portage/tests/resolver/test_multislot.py
index 8615419b5..1331edf25 100644
--- a/pym/portage/tests/resolver/test_multislot.py
+++ b/pym/portage/tests/resolver/test_multislot.py
@@ -14,12 +14,18 @@ class MultSlotTestCase(TestCase):
 
 		ebuilds = {
 			"sys-devel/gcc-4.4.4": { "SLOT": "4.4" },
+			"dev-util/nvidia-cuda-toolkit-4.0" : { "RDEPEND": "sys-devel/gcc:4.4"},
 			}
 
 		installed = {
 			"sys-devel/gcc-4.4.4": { "SLOT": "i686-pc-linux-gnu-4.4.4" },
+			"dev-util/nvidia-cuda-toolkit-4.0" : { "RDEPEND": "sys-devel/gcc:4.4"},
 			}
 
+		world = (
+			"dev-util/nvidia-cuda-toolkit",
+		)
+
 		options = {'--update' : True, '--deep' : True, '--selective' : True}
 
 		test_cases = (
@@ -28,9 +34,17 @@ class MultSlotTestCase(TestCase):
 					options = options,
 					mergelist = [],
 					success = True),
+
+				# depclean test for bug #382823
+				ResolverPlaygroundTestCase(
+					[],
+					options = {"--depclean": True},
+					success = True,
+					cleanlist = []),
 			)
 
-		playground = ResolverPlayground(ebuilds=ebuilds, installed=installed)
+		playground = ResolverPlayground(ebuilds=ebuilds, installed=installed,
+			world=world)
 
 		try:
 			for test_case in test_cases:
-- 
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