iconv deprecation warning with ruby 1.9.3

Question

I\'m getting this warning when I run rspec:

/gems/activesupport-3.1.0/lib/active_support/dependencies.rb:240:in `block in require\': iconv will be deprecated in          


        

Answer 1

If you're seeing this, it's very probably not Rails. If you look at the method surrounding the line being referred to in the error you posted, you'll see the following:

def require(file, *)
  result = false
  load_dependency(file) { result = super }
  result
end

I'm not saying it's your code, necessarily, but I'm certain that it's not actually the line in question where iconv is being called. In my case, I found that my project's code actually contained a reference to iconv.

If you want to check your code for such a reference, try grep -ir iconv ./ in your project directory.

When iconv is actually in a library it can be harder to find. By temporarily changing the above method to:

def require(file, *)
  result = false
  puts
  puts caller.reverse
  load_dependency(file) { result = super }
  result
end

You can then easily run your code and grep out the relevant lines of the backtrace to find the root cause of the warning.

ruby your/code.rb 2>&1 | grep -B 5 iconv