Catch only Exception.

theano/scan_module/scan_opt.py

@@ -453,12 +453,12 @@ class ScanSaveMem(gof.Optimizer):
                     if i > op.n_mit_mot:
                         try:
                             length = shape_of[out][0]
-                        except:
+                        except Exception:
                             length = node.inputs[0] + init_l[i]
                     else:
                         try:
                             length = shape_of[out][0]
-                        except:
+                        except Exception:
                             length = out.shape[0]
                     cf_slice = tensor.basic.get_canonical_form_slice(
                                                     this_slice[0], length)
@@ -555,7 +555,7 @@ class ScanSaveMem(gof.Optimizer):
                     else:
                         try:
                             length = shape_of[out][0]
-                        except:
+                        except Exception:
                             length = out.shape[0]
                     cf_slice = tensor.basic.get_canonical_form_slice(
                                                     this_slice[0],length)