Surround by try-finally to eventually reset flag properly.

theano/sandbox/cuda/tests/test_type.py

@@ -21,6 +21,7 @@ def test_unpickle_cudandarray_as_numpy_ndarray_flag0():
     oldflag = config.experimental.unpickle_gpu_on_cpu
     config.experimental.unpickle_gpu_on_cpu = False
 
+    try:
         testfile_dir = os.path.dirname(os.path.realpath(__file__))
         with open(os.path.join(testfile_dir, 'CudaNdarray.pkl')) as fp:
             if cuda_available:
@@ -32,6 +33,7 @@ def test_unpickle_cudandarray_as_numpy_ndarray_flag0():
             assert isinstance(mat, CudaNdarray)
             assert numpy.asarray(mat)[0] == -42.0
 
+    finally:
         config.experimental.unpickle_gpu_on_cpu = oldflag
 
 
@@ -39,6 +41,7 @@ def test_unpickle_cudandarray_as_numpy_ndarray_flag1():
     oldflag = config.experimental.unpickle_gpu_on_cpu
     config.experimental.unpickle_gpu_on_cpu = True
 
+    try:
         testfile_dir = os.path.dirname(os.path.realpath(__file__))
 
         with open(os.path.join(testfile_dir, 'CudaNdarray.pkl')) as fp:
@@ -47,4 +50,5 @@ def test_unpickle_cudandarray_as_numpy_ndarray_flag1():
         assert isinstance(mat, numpy.ndarray)
         assert mat[0] == -42.0
 
+    finally:
         config.experimental.unpickle_gpu_on_cpu = oldflag