Page crash for some sql query

[hooopo]

for example:

SELECT 
    DATE_SUB(DATE(starred_at), INTERVAL WEEKDAY(starred_at) DAY) AS week_beginning, 
    COUNT(*) as stars
FROM 
    starred_repos
WHERE 
    starred_at >= DATE_SUB(CURRENT_DATE, INTERVAL 30 DAY)
GROUP BY 
    week_beginning
ORDER BY 
    week_beginning ASC;

[634750802]

related to #127