Enconding error on Ruby 2.7

[MatheusRich]

I have an application running on Ruby 2.6.6. I'm using the CSV lib like this, and it works fine:

CSV.read(@params[:csv_file].tempfile, headers: true, col_sep: ';', encoding: 'ISO8859-1:utf-8')

Since I upgraded to Ruby 2.7.1 I got this error

NoMethodError:
  undefined method `close' for #<String:0x0000558b5db78160>
  Did you mean?  clone
# ./app/services/admin/batch_search_service.rb:15:in `batch_search'
# ./app/services/admin/batch_search_service.rb:9:in `search'
# ./spec/services/admin/batch_search_service_spec.rb:7:in `block (3 levels) in <top (required)>'
# ./spec/services/admin/batch_search_service_spec.rb:140:in `block (4 levels) in <top (required)>'
# ------------------
# --- Caused by: ---
# ArgumentError:
#   unknown encoding name - ISO8859-1:utf-8
#   ./app/services/admin/batch_search_service.rb:15:in `batch_search'

However, If I use the explicit params it works:

CSV.read(@params[:csv_file].tempfile, headers: true, col_sep: ';', external_encoding: 'ISO8859-1', internal_encoding: 'utf-8')

I saw no breaking change on the changelog so I'm assuming that this is not expected.

Ruby version:
ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x86_64-linux-musl]

[kou]

Could you show a Ruby script that can run on my machine?

[cypx]

Same problem here, seems to be fixed by #111 (merged but not yet released try to install gems from git).

[kou]

Released.