Error while accessing LF

[anonymous]

...t/liquid_feedback/webapp/app/main/issue/_details.lua:19: attempt to perform arithmetic on field 'population' (a nil value)

Stack trace follows:
...t/liquid_feedback/webapp/app/main/issue/_details.lua:19: in function <...t/liquid_feedback/webapp/app/main/issue/_details.lua:8>
[C]: in function 'tag'
../env/ui/container.lua:88: in function 'container'
../env/ui/form.lua:78: in function 'form'
...t/liquid_feedback/webapp/app/main/issue/_details.lua:4: in function 'func'
../env/execute/file_path.lua:24: in function 'file_path'
../env/execute/view.lua:17: in function 'view'
/opt/liquid_feedback/webapp/env/ui/tabs.lua:114: in function </opt/liquid_feedback/webapp/env/ui/tabs.lua:111>
[C]: in function 'tag'
../env/ui/container.lua:88: in function 'container'
...
../env/execute/wrapped.lua:21: in function <../env/execute/wrapped.lua:11>
(tail call): ?
(tail call): ?
../env/execute/filtered_view.lua:28: in function 'filtered_view'
webmcp.lua:358: in function <webmcp.lua:235>
[C]: in function 'xpcall'
webmcp.lua:234: in main chunk
[C]: in function 'pcall'
...feedback/webmcp/framework/cgi-bin/webmcp-wrapper.lua:7: in main chunk
[C]: ?

Configuration "piraten-pp"
REQUESTED VIEW: initiative/show
/main/_filter/20_session.lua
SELECT "session".* FROM "session" WHERE (ident = 'H8Qqmk26rxwhIWbqbtpYWMgjXBbn608p') LIMIT 1;
/main/_filter/21_auth.lua
No authentication needed.
/main/_filter_view/30_navigation.lua
SELECT "member".* FROM "member" ORDER BY member.name;
/main/_filter_view/31_logout_button.lua
/main/_filter_view/32_searchbox.lua
/main/_filter_view/33_help_hidden.lua
/main/_filter_view/34_stylesheet.lua
/main/_filter_view/35_openid.lua
/main/_filter_view/36_html_title.lua
EXECUTE VIEW: initiative/show
SELECT "initiative".* FROM "initiative" WHERE (id = 3057) LIMIT 1;
EXECUTE VIEW: issue/show
SELECT "issue".* FROM "issue" WHERE (id = 1675) LIMIT 1;
EXECUTE VIEW: issue/_show_head
SELECT "area".* FROM "area" WHERE ("area"."id" IN (9));
EXECUTE VIEW: issue/_show_box
SELECT "policy".* FROM "policy" WHERE ("policy"."id" IN (1));
SELECT '2012-05-02 14:43:31'::timestamp + '15 days'::interval - CURRENT_TIMESTAMP(0) as time_left;
EXECUTE VIEW: initiative/_list
SELECT count(1) FROM (SELECT "initiative".* FROM "initiative" INNER JOIN issue ON issue.id = initiative.issue_id WHERE ("initiative"."issue_id" IN (1675))) AS "subquery" LIMIT 1;
SELECT "initiative".* FROM "initiative" WHERE (id = 3057) LIMIT 1;
EXECUTE VIEW: initiative/_list_element
SELECT "issue".* FROM "issue" WHERE ("issue"."id" IN (1675));
EXECUTE VIEW: initiative/show_partial
EXECUTE VIEW: initiative/_show
EXECUTE VIEW: initiative/show_tab
SELECT count(1) FROM (SELECT "suggestion".* FROM "suggestion" WHERE ("suggestion"."initiative_id" IN (3057))) AS "subquery" LIMIT 1;
SELECT count(1) FROM (SELECT "draft".* FROM "draft" WHERE ("draft"."initiative_id" IN (3057)) ORDER BY "id" DESC) AS "subquery" LIMIT 1;
SELECT "draft".* FROM "draft" WHERE ("draft"."initiative_id" IN (3057)) ORDER BY "id" DESC;
EXECUTE VIEW: initiative/_current_draft
SELECT "draft".* FROM "draft" WHERE ("initiative_id" = 3057) ORDER BY "id" DESC LIMIT 1;
EXECUTE VIEW: draft/_show
SELECT "rendered_draft".* FROM "rendered_draft" WHERE (draft_id = 8247) AND (format = 'html') LIMIT 1;
EXECUTE VIEW: issue/show_tab
EXECUTE VIEW: issue/_details
UNEXPECTED ERROR
Finished after 5381.9 ms (2440.0 ms CPU)