Enable `test_local_loc_erfc`

tests/tensor/test_math_opt.py

@@ -2869,7 +2869,6 @@ class TestLocalErfc:
         f = function([x], erfc(-1.0 * x) + (-1), mode=self.mode)
         assert [n.op for n in f.maker.fgraph.toposort()] == [erf]
 
-    @pytest.mark.xfail()
     def test_local_log_erfc(self):
         val = [-30, -27, -26, -11, -10, -3, -2, -1, 0, 1, 2, 3, 10, 11, 26, 27, 28, 30]
         if config.mode in ["DebugMode", "DEBUG_MODE", "FAST_COMPILE"]:
@@ -2886,42 +2885,27 @@ class TestLocalErfc:
         mode_fusion.check_isfinite = False
 
         f = function([x], log(erfc(x)), mode=mode)
-        assert len(f.maker.fgraph.apply_nodes) == 23
+        assert len(f.maker.fgraph.apply_nodes) == 22
         assert f.maker.fgraph.outputs[0].dtype == config.floatX
         assert all(np.isfinite(f(val)))
 
         f = function([x], log(erfc(-x)), mode=mode)
-        assert len(f.maker.fgraph.apply_nodes) == 24
+        assert len(f.maker.fgraph.apply_nodes) == 23
         assert f.maker.fgraph.outputs[0].dtype == config.floatX
         assert all(np.isfinite(f(-val)))
 
         f = function([x], log(erfc(x)), mode=mode_fusion)
         assert len(f.maker.fgraph.apply_nodes) == 1
         assert f.maker.fgraph.outputs[0].dtype == config.floatX
-        assert (
-            len(
-                f.maker.fgraph.toposort()[0]
-                .fgraph.toposort()[0]
-                .op.scalar_op.fgraph.apply_nodes
-            )
-            == 22
-        )
-        # TODO: fix this problem
-        assert not (
-            config.floatX == "float32"
-            and config.mode
-            in [
-                "DebugMode",
-                "DEBUG_MODE",
-            ]
-        ), (
-            "The python code upcast somewhere internally "
-            "some value of float32 to python float for "
-            "part of its computation. That make that the "
-            "c and python code don't generate the same value. "
-            "You can ignore this error."
-        )
-        assert all(np.isfinite(f(val)))
+        assert len(f.maker.fgraph.toposort()[0].op.scalar_op.fgraph.apply_nodes) == 22
+
+        # TODO: fix this problem: The python code upcast somewhere internally
+        #  some value of float32 to python float for part of its computation.
+        #  That makes the c and python code generate sligtly different values
+        if not (
+            config.floatX == "float32" and config.mode in ["DebugMode", "DEBUG_MODE"]
+        ):
+            assert all(np.isfinite(f(val)))
 
     @np.errstate(divide="ignore", invalid="ignore")
     def test_local_grad_log_erfc_neg(self):