Inside raven.js there is a logic in isSameStacktrace function to determine whether the current error is the same as the previous one (in a certain time frame).

I have something like the following code:

promise.catch(e => Raven.catchException(e))

and I get this report in Sentry:

TypeError: Cannot ready property 'frames' of undefined
(line 324 is highlighted: var frames1 = stack1.frames;)

I would expect to have another "null-check" before accessing this property.

I'm using "raven-js": "^3.12.1", and get this report for different browsers and different operating systems.

Let me know if you find this issue relevant and I'll be happy to submit a fix
Cheers,