Fix case where cachedir is None (i.e. caching disabled)

Author: keysmashes

cwltool/executors.py

@@ -97,7 +97,10 @@ def execute(self,
                 path_mapper=runtime_context.path_mapper)
 
         if runtime_context.rm_tmpdir:
-            cleanIntermediate(filter(lambda x: not x.startswith(runtime_context.cachedir), self.output_dirs))
+            if runtime_context.cachedir is not None:
+                cleanIntermediate(filter(lambda x: not x.startswith(runtime_context.cachedir), self.output_dirs))
+            else:
+                cleanIntermediate(self.output_dirs)
 
         if self.final_output and self.final_status: