jinja2 variable won't update in a loop based on operation performed as expected

[sadaf2605]

I am setting jinja2 variable outside (before) the loop, yet it is being resetted every time the loop is being iterated.
Also asked at stackoverflow: http://stackoverflow.com/questions/43061439/jinja2-variable-wont-update-in-a-loop-based-on-operation-performed-as-expected
I have this following code:

    {% set c = 0 %}
    {% for n in n_list %}

      {% if loop.index % 3 == 0 %}

      {% else %}
          {% set l = range(3, 6) | random %}
            {% set c = c+l %}
      {% endif %}

      {{ loop.index }} {{c}} {{l}}<br>

    {% endfor %}

---

Expected Behavior

1 3 3
2 7 4
2 7 0
2 11 4
...

Actual Behavior

1 3 3
2 4 4
3 0
4 4 4
5 5 5 # ...
6 0
7 5 5
8 5 5
9 0
10 4 4

Template Code

        {% set c = 0 %}
        {% for n in n_list %}

          {% if loop.index % 3 == 0 %}

          {% else %}
              {% set l = range(3, 6) | random %}
                {% set c = c+l %}
          {% endif %}

          {{ loop.index }} {{c}} {{l}}<br>

        {% endfor %}

Your Environment

• Python version: 3.6.0
• Jinja version: 2.9.5

[ThiefMaster]

Duplicate of #641