Fixed the test for the stacktrace.

theano/tensor/tests/test_opt.py

@@ -1635,8 +1635,8 @@ def test_log_add():
 def test_local_useless_slice():
     # test a simple matrix
     x = tensor.matrix('x')
-    mode_unopt = compile.get_default_mode().excluding("local_useless_slice")
-    mode_opt = compile.get_default_mode().including("local_useless_slice")
+    mode_unopt = compile.get_default_mode().excluding("local_useless_slice", "local_mul_canonizer")
+    mode_opt = compile.get_default_mode().including("local_useless_slice").excluding("local_mul_canonizer")
 
     # test with and without the useless slice
     o = 2 * x[0, :]