Error in mapply when rcloud.jupyter fails on RCloud fresh install

2.1.3-devel (develop branch)

Created a new VM with Linux Mint 19.1 Tessa

Followed the install instructions (which have gotten super easy on Linux!)

Everything installed flawlessly. Set my GitHub credentials and Host in rcloud.conf.

Opened RCloud in my browser. Authorized the GitHub application.

Doubtless something is configured wrong (I probably need to follow rcloud.jupyter installation instructions?), but this message is 100% useless.

Aw, shucks

Error: compute_init: Error in mapply(function(from, to) paste(lines[from:to], collapse = "\n"),  : 
  zero-length inputs cannot be mixed with those of non-zero length
collapse
R trace:
suppressWarnings(d(.session))
withCallingHandlers(expr, message = function(c) invokeRestart("muffleMessage"))
suppressMessages(suppressWarnings(d(.session)))
start.rcloud.common(...)
start.rcloud.gist(username = username, token = token, ...)
start.rcloud(...)
fun(...)
Error: compute_init: Error in mapply(function(from, to) paste(lines[from:to], collapse = "\n"),  : 
  zero-length inputs cannot be mixed with those of non-zero length
R trace:
suppressWarnings(d(.session))
withCallingHandlers(expr, message = function(c) invokeRestart("muffleMessage"))
suppressMessages(suppressWarnings(d(.session)))
start.rcloud.common(...)
start.rcloud.gist(username = username, token = token, ...)
start.rcloud(...)
fun(...)
    success@http://127.0.0.1:8080/js/rcloud_bundle.js:32:23
From previous event:
    rcloud_handler/<@http://127.0.0.1:8080/js/rcloud_bundle.js:38:54
    setup_authenticated_ocaps/rcloud.compute_init@http://127.0.0.1:8080/js/rcloud_bundle.js:459:20
    on_connect_anonymous_disallowed@http://127.0.0.1:8080/js/rcloud_bundle.js:5200:17
    rclient_promise/<@http://127.0.0.1:8080/js/rcloud_bundle.js:5243:13
From previous event:
    rclient_promise@http://127.0.0.1:8080/js/rcloud_bundle.js:5240:8
    init@http://127.0.0.1:8080/js/rcloud_bundle.js:5295:16
    main@http://127.0.0.1:8080/edit.js:16:5
    start_require/<@http://127.0.0.1:8080/lib/js/require-common.js:80:17
    execCb@http://127.0.0.1:8080/lib/js/require.js:1650:24
    check@http://127.0.0.1:8080/lib/js/require.js:861:47
    enable/</<@http://127.0.0.1:8080/lib/js/require.js:1113:29

Removing rcloud.jupyter from rcloud.languages, RCloud starts ok.

att / rcloud

Error in mapply when rcloud.jupyter fails on RCloud fresh install #2653

Aw, shucks