Traceback (most recent call last):

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 115, in get_response
    response = callback(request, *callback_args, **callback_kwargs)

  File "/home/users/sio2/sio2/venv/src/oioioi/oioioi/problems/views.py", line 98, in add_or_update_problem_view
    content = problem_or_content.render().content

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/response.py", line 105, in render
    self.content = self.rendered_content

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/response.py", line 82, in rendered_content
    content = template.render(context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/base.py", line 140, in render
    return self._render(context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/test/utils.py", line 66, in instrumented_test_render
    return self.nodelist.render(context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/base.py", line 830, in render
    bit = self.render_node(node, context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/base.py", line 844, in render_node
    return node.render(context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/loader_tags.py", line 156, in render
    return self.render_template(self.template, context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/loader_tags.py", line 138, in render_template
    output = template.render(context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/base.py", line 140, in render
    return self._render(context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/test/utils.py", line 66, in instrumented_test_render
    return self.nodelist.render(context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/base.py", line 830, in render
    bit = self.render_node(node, context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/base.py", line 844, in render_node
    return node.render(context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/defaulttags.py", line 196, in render
    nodelist.append(node.render(context))

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/base.py", line 887, in render
    return _render_value_in_context(output, context)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/template/base.py", line 865, in _render_value_in_context
    value = force_text(value)

  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/utils/encoding.py", line 115, in force_text
    raise DjangoUnicodeDecodeError(s, *e.args)

DjangoUnicodeDecodeError: 'utf8' codec can't decode byte 0xf3 in position 63: invalid continuation byte. You passed in 'Failed to execute command: make inwer\nBrak weryfikatora do test\xf3w\nmake: *** [inwer] Error 2\n' (<type 'str'>)