> It didn’t correspond to a Google Docs release. The stack trace added very little information. There wasn’t an associated spike in user complaints, so we weren’t even sure it was really happening — but if it was happening it would be really bad. It was Chrome-only starting at a specific release.
That sounds like a Chrome bug. Or, at least, a bug triggered by a change in Chrome. Bisecting your code when their change reveals a crash is folly, regardless of whose bug it is.