slot_collision: be consistent with missing IUSE

Special handling for missing IUSE that was introduced in commit
9a193d42032005396800eb30e550691513529c79 is also useful in one
more spot.

2 files changed, 32 insertions, 7 deletions

diff --git a/pym/_emerge/resolver/slot_collision.py b/pym/_emerge/resolver/slot_collision.py
index d43b8892d..00429976a 100644
--- a/pym/_emerge/resolver/slot_collision.py
+++ b/pym/_emerge/resolver/slot_collision.py
@@ -337,14 +337,21 @@ class slot_conflict_handler(object):
 							#are fewer possible solutions.
 							use = sub_type
 							for ppkg, atom, other_pkg in parents:
-								parent_use = None
-								if isinstance(ppkg, Package):
-									parent_use = _pkg_use_enabled(ppkg)
-								violated_atom = atom.unevaluated_atom.violated_conditionals( \
-									_pkg_use_enabled(other_pkg), other_pkg.iuse.is_valid_flag,
-									parent_use=parent_use)
-								if use in violated_atom.use.enabled.union(violated_atom.use.disabled):
+								missing_iuse = other_pkg.iuse.get_missing_iuse(
+									atom.unevaluated_atom.use.required)
+								if missing_iuse:
 									unconditional_use_deps.add((ppkg, atom))
+								else:
+									parent_use = None
+									if isinstance(ppkg, Package):
+										parent_use = _pkg_use_enabled(ppkg)
+									violated_atom = atom.unevaluated_atom.violated_conditionals(
+										_pkg_use_enabled(other_pkg),
+										other_pkg.iuse.is_valid_flag,
+										parent_use=parent_use)
+									if use in violated_atom.use.enabled or \
+										use in violated_atom.use.disabled:
+										unconditional_use_deps.add((ppkg, atom))
 								# When USE flags are removed, it can be
 								# essential to see all broken reverse
 								# dependencies here, so don't omit any.
diff --git a/pym/portage/tests/resolver/test_slot_collisions.py b/pym/portage/tests/resolver/test_slot_collisions.py
index 5839a39c3..4867cea05 100644
--- a/pym/portage/tests/resolver/test_slot_collisions.py
+++ b/pym/portage/tests/resolver/test_slot_collisions.py
@@ -31,6 +31,15 @@ class SlotCollisionTestCase(TestCase):
 			"sci-libs/Q-2": { "SLOT": "2", "IUSE": "+bar +foo", "EAPI": 2, "PDEPEND": "sci-libs/Q:1[bar?,foo?]" },
 			"sci-libs/P-1": { "DEPEND": "sci-libs/Q:1[foo=]", "IUSE": "foo", "EAPI": 2 },
 
+			"sys-libs/A-1": { "RDEPEND": "foo? ( sys-libs/J[foo=] )", "IUSE": "+foo", "EAPI": "4" },
+			"sys-libs/B-1": { "RDEPEND": "bar? ( sys-libs/J[bar=] )", "IUSE": "+bar", "EAPI": "4" },
+			"sys-libs/C-1": { "RDEPEND": "sys-libs/J[bar]", "EAPI": "4" },
+			"sys-libs/D-1": { "RDEPEND": "sys-libs/J[bar?]", "IUSE": "bar", "EAPI": "4" },
+			"sys-libs/E-1": { "RDEPEND": "sys-libs/J[foo(+)?]", "IUSE": "+foo", "EAPI": "4" },
+			"sys-libs/F-1": { "RDEPEND": "sys-libs/J[foo(+)]", "EAPI": "4" },
+			"sys-libs/J-1": { "IUSE": "+foo", "EAPI": "4" },
+			"sys-libs/J-2": { "IUSE": "+bar", "EAPI": "4" },
+
 			"app-misc/A-1": { "IUSE": "foo +bar", "REQUIRED_USE": "^^ ( foo bar )", "EAPI": "4" },
 			"app-misc/B-1": { "DEPEND": "=app-misc/A-1[foo=]", "IUSE": "foo", "EAPI": 2 },
 			"app-misc/C-1": { "DEPEND": "=app-misc/A-1[foo]", "EAPI": 2 },
@@ -62,6 +71,15 @@ class SlotCollisionTestCase(TestCase):
 				ignore_mergelist_order = True,
 				slot_collision_solutions = [ {"dev-libs/A-1": {"foo": True}, "dev-libs/D-1": {"foo": True}} ]),
 
+			ResolverPlaygroundTestCase(
+				["sys-libs/A", "sys-libs/B", "sys-libs/C", "sys-libs/D", "sys-libs/E", "sys-libs/F"],
+				options = { "--autounmask": 'n' },
+				success = False,
+				ignore_mergelist_order = True,
+				slot_collision_solutions = [],
+				mergelist = ['sys-libs/J-2', 'sys-libs/J-1', 'sys-libs/A-1', 'sys-libs/B-1', 'sys-libs/C-1', 'sys-libs/D-1', 'sys-libs/E-1', 'sys-libs/F-1'],
+				),
+
 			#A version based conflicts, nothing we can do.
 			ResolverPlaygroundTestCase(
 				["=app-misc/X-1", "=app-misc/Y-1"],