error when generating report

[hgn]

./tests/check-when-title-and-categories-changed.sh followed by a "Generate PDF report" results in an error.

We said that a test MUST always have an achievement, right!? So somehow this is broken even before in the _post.py routine where a test is added without an achievement, right?

Exception in callback generate_doc(<Application 0x7fdf1ebdeb38>, {'filter-type': 'Latest Tests'})() at /home/pfeifer/src/misc/hippod/hippod/api_report.py:23
handle: <Handle generate_doc(<Application 0x7fdf1ebdeb38>, {'filter-type': 'Latest Tests'})() at /home/pfeifer/src/misc/hippod/hippod/api_report.py:23>
Traceback (most recent call last):
  File "/usr/lib/python3.5/asyncio/events.py", line 126, in _run
    self._callback(*self._args)
  File "/home/pfeifer/src/misc/hippod/hippod/api_report.py", line 26, in generate_doc
    rep_gen.generate(app, outputs=[rep_gen.PDF], report_filter=rep_gen.LAST_ACHIEVEMENTS)
  File "/home/pfeifer/src/misc/hippod/hippod/report_generator.py", line 28, in generate
    list_of_lists = ReportGenerator.ReportGeneratorCollector.search(app, report_filter)
  File "/home/pfeifer/src/misc/hippod/hippod/report_generator.py", line 392, in search
    last_attach = ReportGenerator.ReportGeneratorCollector.search_last_attachment(app, cont['object-item-id'])
  File "/home/pfeifer/src/misc/hippod/hippod/report_generator.py", line 443, in search_last_attachment
    last_attach = attach_list[0]
IndexError: list index out of rang