assert assignment is not none

src/poetry/mixology/partial_solution.py

@@ -147,7 +147,9 @@ class PartialSolution:
         name = assignment.dependency.complete_name
         old_positive = self._positive.get(name)
         if old_positive is not None:
-            self._positive[name] = old_positive.intersect(assignment)
+            value = old_positive.intersect(assignment)
+            assert value is not None
+            self._positive[name] = value
 
             return
 

tests/console/commands/test_show.py

@@ -752,7 +752,7 @@ def test_show_outdated_has_prerelease_and_allowed(
 ):
     poetry.package.add_dependency(
         Factory.create_dependency(
-            "cachy", {"version": "^0.1.0", "allow-prereleases": True}
+            "cachy", {"version": ">=0.0.1", "allow-prereleases": True}
         )
     )
     poetry.package.add_dependency(Factory.create_dependency("pendulum", "^2.0.0"))