on_slim_embedded raises ArgumentError with Sinatra and slim/include

[betrue12]

When I use embedding such as javascript: in some condition, on_slim_embedded raises ArgumentError.

ArgumentError - wrong number of arguments (given 3, expected 2):
        /var/lib/gems/2.5.0/gems/slim-4.0.0/lib/slim/filter.rb:16:in `on_slim_embedded'

Condition

When using Slim v4.0.0 with Sinatra, and requiring slim/include.

I confirmed that this error doesn't occur when I use slimrb, nor Sinatra without requiring slim/include.

Slim v3.0.9 works well.

Environment

• Ubuntu 18.04
• Ruby 2.5.1p57
• Gems
  • slim 4.0.0
  • sinatra 2.0.3
  • temple 0.8.0
  • tilt 2.0.8

Sample code and full stacktrace

Too long, so I uploaded them in my Gist.

https://gist.github.com/betrue12/d1cfdd858669889b6c9cb24ebf950f72

Thank you!