Davis Vaughan

@iamYannC the `Console: R` logs are quite helpful, thanks!

@iamYannC okay one more request. Please do exactly what you did before with the logs, but first go into Settings (`Cmd + ,` on Mac) and change this setting to...

Or maybe call it `allow_missing` since this is a list and `NULL` is the missing type

Might also make sense for `list_check_all_size()` and `list_all_size()` too

I guess the `message` in that tidyr case could look like this? ```r message

Could you please turn this into a self-contained [reprex](http://reprex.tidyverse.org/) (short for minimal **repr**oducible **ex**ample)? It will help us help you if we can be sure we're all working with/looking at...

Ah, I think `tidyr:::complete.grouped_df()` needs to do `.env$fill` and `.env$explicit` when passing them through since they go into a dplyr function (which will use column names first if they exist)....

Can you please paste the code that you ran in as text so it is easy for us to try?

Okay I was able to reproduce. It does look like if you hit `CMD + Enter` really really fast _and_ there is some longer running code involved (like loading these...

I've got a pretty good idea of what the problem is here, but I could use some advice on the best way to solve this kind of thing. I think...