error: problems parsing template source at row 1, column 34 near:
       "([]) }}{{ v }},{% endfor %}"
 --> tests/ui/loop_cycle_empty.rs:6:10
  |
6 | #[derive(Template)]
  |          ^^^^^^^^
  |
  = note: this error originates in the derive macro `Template` (in Nightly builds, run with -Z macro-backtrace for more info)