Properly normalize and handle linked dist

src/pip/_internal/metadata/importlib/_dists.py

@@ -26,6 +26,7 @@
     InfoPath,
     Wheel,
 )
+from pip._internal.utils.misc import normalize_path
 from pip._internal.utils.packaging import safe_extra
 from pip._internal.utils.wheel import parse_wheel, read_wheel_metadata_file
 
@@ -141,7 +142,7 @@ def info_location(self) -> Optional[str]:
     def installed_location(self) -> Optional[str]:
         if self._installed_location is None:
             return None
-        return str(self._installed_location)
+        return normalize_path(self._installed_location)
 
     def _get_dist_name_from_location(self) -> Optional[str]:
         """Try to get the name from the metadata directory name.

src/pip/_internal/metadata/importlib/_envs.py

@@ -151,10 +151,11 @@ def _iter_distributions(self) -> Iterator[BaseDistribution]:
         finder = _DistributionFinder()
         for location in self._paths:
             yield from finder.find(location)
-            yield from finder.find_linked(location)
             for dist in finder.find_eggs(location):
                 # _emit_egg_deprecation(dist.location)  # TODO: Enable this.
                 yield dist
+            # This must go last because that's how pkg_resources tie-breaks.
+            yield from finder.find_linked(location)
 
     def get_distribution(self, name: str) -> Optional[BaseDistribution]:
         matches = (

src/pip/_internal/req/req_uninstall.py

@@ -526,10 +526,10 @@ def from_dist(cls, dist: BaseDistribution) -> "UninstallPathSet":
             # PEP 660 modern editable is handled in the ``.dist-info`` case
             # above, so this only covers the setuptools-style editable.
             with open(develop_egg_link) as fh:
-                link_pointer = os.path.normcase(fh.readline().strip())
-            assert link_pointer == dist_location, (
+                link_pointer = normalize_path(fh.readline().strip())
+            assert link_pointer == normalized_dist_location, (
                 f"Egg-link {link_pointer} does not match installed location of "
-                f"{dist.raw_name} (at {dist_location})"
+                f"{dist.raw_name} (at {normalized_dist_location})"
             )
             paths_to_remove.add(develop_egg_link)
             easy_install_pth = os.path.join(

tests/functional/test_uninstall.py

@@ -615,11 +615,13 @@ def test_uninstall_setuptools_develop_install(
     script.assert_installed(FSPkg="0.1.dev0")
     # Uninstall both develop and install
     uninstall = script.pip("uninstall", "FSPkg", "-y")
-    assert any(filename.endswith(".egg") for filename in uninstall.files_deleted.keys())
+    assert any(
+        filename.endswith(".egg") for filename in uninstall.files_deleted
+    ), str(uninstall)
     uninstall2 = script.pip("uninstall", "FSPkg", "-y")
     assert (
         join(script.site_packages, "FSPkg.egg-link") in uninstall2.files_deleted
-    ), list(uninstall2.files_deleted.keys())
+    ), str(uninstall2)
     script.assert_not_installed("FSPkg")