stack level too deep (SystemStackError)

[philwhln]

"stack level too deep (SystemStackError)"

ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-linux]

I get this issue in addressable/idna.rb

The require of addressable/idna/pure.rb is failing.

require "addressable/idna/pure"

Running this example....
https://github.com/cjbottaro/em-xmlrpc-client

require "eventmachine"
require "em-xmlrpc-client"

EM.run do
  Fiber.new do
    client = XMLRPC::Client.new2("http://blah.com/api")
    result = client.call("someMethod", "arg1", 123) # Uses em-http-request.
  end.resume
end

The issue is being caused because the data assigned to UNICODE_DATA is too large. If I break it up with {}.merge({}).merge({}) statements I do not see this issue.

I cannot reproduce this outside of the above example.

[sporkmonger]

Can you duplicate outside Event Machine? I'm really going to need a minimal test case here.

[philwhln]

Hi Bob,

Thanks for the reply.

I managed to replicate it outside of Event Machine, but not outside of Fibers...

require "fiber"

f = Fiber.new do
  require "addressable/idna/pure"
end
f.resume

stack level too deep (SystemStackError)

$ uname -a
Linux stackato-nrb6 2.6.38-13-server #57~lucid1-Ubuntu SMP Tue Mar 6 20:23:13 UTC 2012 x86_64 GNU/Linux
$ ruby -v
ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-linux]

My short-term solution is to require "require 'addressable/idna'" at the top of my script before anything else runs, although this is not ideal, because 'addressable/idna' is a dependency of a dependency of a dependency.

[sporkmonger]

OK, thanks, I think that should be sufficient for a test case.

[sporkmonger]

Yup, confirmed, was able to get a working test that reproduces this.