Handle malformed version metadata error and skip the package

news/13443.bugfix.rst

@@ -0,0 +1,2 @@
+Handle malformed version metadata entries and ignore packages
+with invalid ``Version`` instead of crashing.

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

@@ -31,6 +31,7 @@
     BasePath,
     get_dist_canonical_name,
     parse_name_and_version_from_info_directory,
+    BadMetadata,
 )
 
 
@@ -165,9 +166,14 @@ def canonical_name(self) -> NormalizedName:
 
     @property
     def version(self) -> Version:
-        if version := parse_name_and_version_from_info_directory(self._dist)[1]:
+        try:
+            version = (
+                parse_name_and_version_from_info_directory(self._dist)[1]
+                or self._dist.version
+            )
             return parse_version(version)
-        return parse_version(self._dist.version)
+        except TypeError:
+            raise BadMetadata(self._dist, reason="invalid metadata entry `version`")
 
     @property
     def raw_version(self) -> str:

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

@@ -68,6 +68,8 @@ def _find_impl(self, location: str) -> Iterator[FoundResult]:
             info_location = get_info_location(dist)
             try:
                 name = get_dist_canonical_name(dist)
+                distribution = Distribution(dist, info_location, None)
+                getattr(distribution, "version")
             except BadMetadata as e:
                 logger.warning("Skipping %s due to %s", info_location, e.reason)
                 continue