Issue with carriage return/line feed

[jsoules]

Reported on the Stan User Forums https://discourse.mc-stan.org/t/stan-playground-issues-with-pasting-scripts/37498

I was playing around with a simple model for a teaching demonstration and I noticed that if I paste code into the analysis/data script. I get the following errors:

If I paste the following R code into the data script

data <- list(
 n_samp = 60034,
 n_cont = 3255,
 n_samp_conv = 592,
 n_cont_conv = 27
)

and run it I get the following error:

Error: <text>:1:14: unexpected invalid token
1: data <- list(
                  ^
Error: [stan-playground] data must be a list
hL: Can't convert object of type null to string.

But if I delete all the code, save, and click “generate example”, delete the generated code and paste the original, I get no error.

The same is true for the analysis script, except the error encountered there is:

Error: <text>:30:33: unexpected invalid token
29: rm(.SP_DATA_IN)
30: attr(draws, 'dimnames')$variable

Again, if I click “generate example” first in the analysis script before pasting my code I don’t have an issue.

I was able to repeatedly replicate this on an incognito browser window using Microsoft Edge. I’d be using Chrome, but company policy to use Edge.

We suspect this is an issue with WebR interacting poorly with Windows-style CRLF line endings.