Booleans have no anchors (when they exist at all).

Author: Julian

referencing/jsonschema.py

@@ -49,8 +49,10 @@ def _legacy_id(contents: ObjectSchema) -> URI | None:
 
 def _legacy_anchor_in_id(
     specification: Specification[ObjectSchema],
-    contents: ObjectSchema,
+    contents: Schema,
 ) -> Iterable[Anchor[ObjectSchema]]:
+    if isinstance(contents, bool):
+        return []
     id = contents.get("$id", "")
     if not id.startswith("#"):
         return []

referencing/tests/test_jsonschema.py

@@ -79,6 +79,20 @@ def test_id_of_bool(specification, value):
     assert specification.id_of(value) is None
 
 
+@pytest.mark.parametrize(
+    "specification",
+    [
+        referencing.jsonschema.DRAFT202012,
+        referencing.jsonschema.DRAFT201909,
+        referencing.jsonschema.DRAFT7,
+        referencing.jsonschema.DRAFT6,
+    ],
+)
+@pytest.mark.parametrize("value", [True, False])
+def test_anchors_in_bool(specification, value):
+    assert specification.anchors_in(value) == []
+
+
 @pytest.mark.parametrize(
     "uri, expected",
     [