minor changes

doc/faq.txt

@@ -4,7 +4,6 @@
 ==========================
 Frequently Asked Questions
 ==========================
-3B
 TypeError: object of type 'TensorVariable' has no len()
 -------------------------------------------------------
 

theano/compile/function_module.py

@@ -1239,6 +1239,7 @@ class FunctionMaker(object):
         add_stack_trace_on_call_orig = gof.Op.add_stack_trace_on_call
         
         if need_opt:
+            try:
                 # optimize the fgraph
                 theano.config.compute_test_value = theano.config.compute_test_value_opt
                 gof.Op.add_stack_trace_on_call = False
@@ -1254,7 +1255,7 @@ class FunctionMaker(object):
 
                 #Add deep copy to respect the memory interface
                 insert_deepcopy(fgraph, inputs, outputs + additional_outputs)
-        # fgraph is already optimized
+            finally:
                 theano.config.compute_test_value = compute_test_value_orig
                 gof.Op.add_stack_trace_on_call = add_stack_trace_on_call_orig