/home/yomgui/code/aime/api/model/crossings.js:62
if (url[0] === '/')
^
TypeError: Cannot read property '0' of undefined
at ensureUrl (/home/yomgui/code/aime/api/model/crossings.js:62:10)
at /home/yomgui/code/aime/api/model/crossings.js:104:20
at Array.forEach (native)
at /home/yomgui/code/aime/api/model/crossings.js:74:20
at Array.forEach (native)
at getDocumentThumbnail (/home/yomgui/code/aime/api/model/crossings.js:71:16)
at /home/yomgui/code/aime/api/model/crossings.js:300:22
at Array.map (native)
at /home/yomgui/code/aime/api/model/crossings.js:222:36
at /home/yomgui/code/aime/node_modules/async/lib/async.js:682:13