Raising here because I suspect this to be something related to tsserver as opposed to Tsuquyomi itself given the relatively insignificant changes in the latter since December 2015

cc @Quramy

This is something I've spotted over the last few days. I can't be sure when it started because it doesn't happen reliably, and indeed there aren't a specific set of steps that I can run to reproduce the issue.

TypeScript: 1.9.0-dev.20160429
Tsuquyomi:  9d93496 - https://github.com/Quramy/tsuquyomi/tree/9d93496c90e96ac75511ad59a93df9e2fd627f6f
Vim:        NVIM v0.1.5-83-g3dc8cdc

The follow error is triggered when I try to initiate a completion:

Error detected while processing function tsuquyomi#complete:
line   38:
E716: Key not present in Dictionary: 0
Press ENTER or type command to continue

Once I have encountered this error, Tsuquyomi effectively "falls over" (although the tsserver process is still running) - i.e. I can't attempt any further completions. The situation is only "reset" by me saving the file, at which point I can try again.

Anyone else seeing this? Perhaps not specifically with Tsuquyomi but with other tsserver clients (which would clearly result in different non-Tsuquyomi specific errors)?