added cycle_detection flag to travis

.travis.yml

@@ -55,17 +55,17 @@ matrix:
   fast_finish: true
   include:
     - python: "3.3"
-      env: PART="--exclude-dir=theano/tensor -e test_flake8.py ." THEANO_FLAGS="mode=FAST_COMPILE"
+      env: PART="--exclude-dir=theano/tensor -e test_flake8.py ." THEANO_FLAGS="mode=FAST_COMPILE,cycle_detection='fast'"
     - python: "3.3"
-      env: PART="theano/tensor --exclude-dir=theano/tensor/nnet" THEANO_FLAGS="mode=FAST_COMPILE"
+      env: PART="theano/tensor --exclude-dir=theano/tensor/nnet" THEANO_FLAGS="mode=FAST_COMPILE,cycle_detection='fast'"
     - python: "3.3"
-      env: PART="theano/tensor/nnet" THEANO_FLAGS="mode=FAST_COMPILE"
+      env: PART="theano/tensor/nnet" THEANO_FLAGS="mode=FAST_COMPILE,cycle_detection='fast'"
     - python: "2.7"
-      env: PART="--exclude-dir=theano/tensor -e test_flake8.py ." THEANO_FLAGS="mode=FAST_COMPILE,floatX=float32"
+      env: PART="--exclude-dir=theano/tensor -e test_flake8.py ." THEANO_FLAGS="mode=FAST_COMPILE,floatX=float32,cycle_detection='fast'"
     - python: "2.7"
-      env: PART="theano/tensor --exclude-dir=theano/tensor/nnet" THEANO_FLAGS="mode=FAST_COMPILE,floatX=float32"
+      env: PART="theano/tensor --exclude-dir=theano/tensor/nnet" THEANO_FLAGS="mode=FAST_COMPILE,floatX=float32,cycle_detection='fast'"
     - python: "2.7"
-      env: PART="theano/tensor/nnet" THEANO_FLAGS="mode=FAST_COMPILE,floatX=float32"
+      env: PART="theano/tensor/nnet" THEANO_FLAGS="mode=FAST_COMPILE,floatX=float32,cycle_detection='fast'"
 
 script:
   - export THEANO_FLAGS=$THEANO_FLAGS,warn.ignore_bug_before=all,on_opt_error=raise,on_shape_error=raise,gcc.cxxflags=-pipe

theano/compile/mode.py

@@ -106,7 +106,7 @@ class AddDestroyHandler(gof.Optimizer):
                              "how was this output left unprotected against "
                              "destructive operations?"
                              % o)
-	    except gof.InconsistencyError as e:
+            except gof.InconsistencyError:
                 # This output is already impossible to destroy.
                 # No guard necessary
                 pass