Cannot read properties of undefined (reading 'has')

[harry-73]

Hi,

Sometimes, i have this error. I am currently not able to find a reproduction way.

client.js:116 Uncaught TypeError: Cannot read properties of undefined (reading 'has')
    at maybeSwitchSub (client.js:116:15)
    at clean (subscribe.js:111:5)
    at subscribe.js:188:9

[harry-73]

Hi,

What happens:

• Offline package puts documents (for example 12) into a minimongo collection.
• in your app, you subscribe to a.oncepublication with a parameter that limit the number of document (3).

when the cache duration expires, in the maybeSwitchSub (utils/client.js), for the documents inserted by Offline package and not by the souscription, ids is undefined as there is no Symbol(subs) field.

So modifying in the maybeSwitchSub function:

if (ids.has(subId)) continue;
by
if (!ids || ids.has(subId)) continue;

seems to do the job