code: def _log_unicode_errors(logger, log_level):
      
      def log_debug_render(*args, **kwargs):
          try:
              return debug_variable_node_render(*args, **kwargs)
          except UnicodeDecodeError:
              logger.log(
                  log_level,
                  "UnicodeDecodeError in template rendering",
                  exc_info=True)
          return ''
  
      def log_render(*args, **kwargs):
          try:
              return variable_node_render(*args, **kwargs)
          except UnicodeDecodeError:
              logger.log(
                  log_level,
                  "UnicodeDecodeError in template rendering",
                  exc_info=True)
          return ''
  
      patch_base = patch.object(VariableNode, 'render', log_render)
      patch_all = patch_base
      if django.VERSION < (1, 9):
          from django.template.debug import DebugVariableNode
          patch_debug = patch.object(DebugVariableNode, 'render',
                                     log_debug_render)
          patch_all = _compose(patch_all, patch_debug)
      return lambda f: patch_all(f)
docs: Catches/logs UnicodeDecodeError.