uninitialized constant ExecJS::Runtimes::RubyRacerRuntime

[Dvelezs94]

Hello, Im having an issue on Rails 5 where suddenly im getting this error (the app worked yesterday). here is my app info

root@144a09c0de36:/app# rails version
Rails 5.2.1
root@144a09c0de36:/app# node -v
v8.11.4
root@144a09c0de36:/app# gem query --local

*** LOCAL GEMS ***

actioncable (5.2.1)
actionmailer (5.2.1)
actionpack (5.2.1)
actionview (5.2.1)
activejob (5.2.1)
activemodel (5.2.1)
activerecord (5.2.1)
activestorage (5.2.1)
activesupport (5.2.1)
arel (9.0.0)
autoprefixer-rails (9.1.3)
bigdecimal (default: 1.3.4)
bindex (0.5.0)
bootsnap (1.3.1)
bootstrap (4.1.3)
builder (3.2.3)
bundler (1.16.3, default: 1.16.2)
byebug (10.0.2)
cmath (default: 1.0.0)
coffee-rails (4.2.2)
coffee-script (2.4.1)
coffee-script-source (1.12.2)
commonjs (0.2.7)
concurrent-ruby (1.0.5)
crass (1.0.4)
csv (default: 1.0.0)
date (default: 1.0.0)
dbm (default: 1.0.0)
did_you_mean (1.2.0)
erubi (1.7.1)
etc (default: 1.0.0)
execjs (2.7.0)
fcntl (default: 1.0.0)
ffi (1.9.25)
fiddle (default: 1.0.0)
fileutils (default: 1.0.2)
font-awesome-rails (4.7.0.4)
gdbm (default: 2.0.0)
globalid (0.4.1)
i18n (1.1.0)
io-console (default: 0.4.6)
ipaddr (default: 1.2.0)
jbuilder (2.7.0)
jquery-rails (4.3.3)
json (default: 2.1.0)
less (2.6.0)
less-rails (2.8.0)
less-rails-bootstrap (3.3.5.0)
libv8 (3.16.14.19 x86_64-linux)
listen (3.1.5)
loofah (2.2.2)
mail (2.7.0)
marcel (0.3.2)
method_source (0.9.0)
mimemagic (0.3.2)
mini_mime (1.0.1)
mini_portile2 (2.3.0)
minitest (5.11.3, 5.10.3)
msgpack (1.2.4)
multi_json (1.13.1)
net-telnet (0.1.1)
nio4r (2.3.1)
nokogiri (1.8.4)
openssl (default: 2.1.0)
pg (1.0.0)
popper_js (1.14.3)
power_assert (1.1.1)
psych (default: 3.0.2)
puma (3.12.0)
rack (2.0.5)
rack-test (1.1.0)
rails (5.2.1)
rails-dom-testing (2.0.3)
rails-html-sanitizer (1.0.4)
railties (5.2.1)
rake (12.3.1, 12.3.0)
rb-fsevent (0.10.3)
rb-inotify (0.9.10)
rdoc (default: 6.0.1)
ref (2.0.0)
ruby_dep (1.5.0)
rubygems-update (2.7.7)
sass (3.5.7)
sass-listen (4.0.0)
sass-rails (5.0.7)
scanf (default: 1.0.0)
sdbm (default: 1.0.0)
spring (2.0.2)
spring-watcher-listen (2.0.1)
sprockets (3.7.2)
sprockets-rails (3.2.1)
stringio (default: 0.0.1)
strscan (default: 1.0.0)
test-unit (3.2.7)
therubyracer (0.12.3)
thor (0.20.0)
thread_safe (0.3.6)
tilt (2.0.8)
turbolinks (5.2.0)
turbolinks-source (5.2.0)
tzinfo (1.2.5)
uglifier (4.1.18)
web-console (3.6.2)
webrick (default: 1.4.2)
websocket-driver (0.7.0)
websocket-extensions (0.1.3)
xmlrpc (0.3.0)
zlib (default: 1.0.0)

I have both of these in my Gemfile

gem 'execjs'
gem 'therubyracer'

Here is my Dockerfile

FROM ruby:2.5
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev curl software-properties-common
RUN curl -sL https://deb.nodesource.com/setup_8.x | bash -
RUN apt install -y nodejs
RUN mkdir /app
WORKDIR /app
COPY . .
RUN bundle install
RUN rm -f tmp/pids/server.pid
CMD bundle exec rails s -p 3000 -b '0.0.0.0'

[rafaelfranca]

Can you please provide a sample application that reproduces the error?

[Dvelezs94]

@rafaelfranca the piece of code i want to run is this

app_1      | ActionView::Template::Error (uninitialized constant ExecJS::Runtimes::RubyRacerRuntime):
app_1      |     70:     <div class="container-fluid p-0">
app_1      |     71:     <div class="row no-gutters">
app_1      |     72:
app_1      |     73:         <div class="col-lg-6 order-lg-2 text-white showcase-img" style="background-image: url(<%= asset_path('bg-showcase-1.jpg') %>);"></div>
app_1      |     74:         <div class="col-lg-6 order-lg-1 my-auto showcase-text">
app_1      |     75:         <h2>Fully Responsive Design</h2>
app_1      |     76:         <p class="lead mb-0">When you use a theme created by Start Bootstrap, you know that the theme will look great on any device, whether it's a phone, tablet, or desktop the page will behave responsively!</p>
app_1      |
app_1      | app/views/pages/index.html.erb:73:in `_app_views_pages_index_html_erb__1509257406324096851_47129302344520'

[rafaelfranca]

Right, but with no way to reproduce we can't do anything, this is why I'm asking an new application that reproduces this error. Maybe the problem is in your code.

[Dvelezs94]

@rafaelfranca Ive created this repo with a sample app where the issue is the same. https://github.com/Dvelezs94/racerissue . I also included a helper script so u can follow the same steps im doing (on the readme)

Prerequisites:

• Docker
• Docker-compose

Steps:
1.- start
2.- create db
3.- visit localhost (you should see the error here)

Thanks in Advance!

[rafaelfranca]

This is a bug in autoprefixer-rails ai/autoprefixer-rails@e572cb7. This runtime that it is looking for doesn't exist. It is ExecJS::RubyRacerRuntime.

[Dvelezs94]

@rafaelfranca Thank you! that was the issue

So for the people that has this issue.
Replace gem 'therubyracer' for gem 'mini_racer', platforms: :ruby

[rafaelfranca]

That is not the fix. We need to report the bug to autoprefixer-rails their code is wrong.