Specific exception handlers are not called when using rescue_from with option 'with:'

[ktimothy]

I ran into the strange behaviour while refactoring my api and moving error handling into separate file. So I wrote this minimal example to reproduce the issue.

Here I use blocks to handle specific exceptions and call specific helper method:

class API < Grape::API
  helpers do 
    def argument_error e
      rack_response({ error: "argument_error_block" }.to_json)
    end

    def all_errors e
      rack_response({ error: "all_errors_block" }.to_json)
    end
  end

  rescue_from ArgumentError do |e| argument_error(e); end
  rescue_from :all do |e| all_errors(e); end

  get :argument_error do
    raise ArgumentError
  end
end

When I request /argument_error API responds, as intended, with {"error":"argument_error_block"}. But if I use with: in rescue_from

  rescue_from ArgumentError, with: :argument_error
  rescue_from :all, with: :all_errors

I start to receive {"error":"all_errors_block"} and never get to argument_error helper.