link sparse issue

Author: crusaderky

tests/test_funcs.py

@@ -416,7 +416,7 @@ def test_complex(self, xp: ModuleType):
         expect = xp.asarray([[1.0, -1.0j], [1.0j, 1.0]], dtype=xp.complex128)
         xp_assert_close(actual, expect)
 
-    @pytest.mark.xfail_xp_backend(Backend.SPARSE, reason="matmul with nan fillvalue")
+    @pytest.mark.xfail_xp_backend(Backend.SPARSE, reason="sparse#877")
     def test_empty(self, xp: ModuleType):
         with warnings.catch_warnings(record=True):
             warnings.simplefilter("always", RuntimeWarning)