RBX fail with ffi-inline

gistfile1.rb

Successfully installed ffi-inline-0.0.4.1
1 gem installed
User@unknown:/tmp/ruby-ffi-inline(master)$ rake
rspec inline_spec.rb --color --format doc

FFI::Inline
  should extend the module with inline methods
  should correctly parse function signature
  should load cached libraries (FAILED - 1)
  should recompile if the code is updated
  should recompile if the code is changed after a failure
  should be configured using the block form
  should allow users to add type maps
  should allow users to include header files
  should allow users to add external libraries (FAILED - 2)
  should generate C struct from FFI::Struct (PENDING: No reason given)
  should return the current compiler
  should raise errors
  should respect blocking flag
  GXX compiler
    should compile and link a shim C library that encapsulates C++ code

Pending:
  FFI::Inline should generate C struct from FFI::Struct
    # No reason given
    # ./inline_spec.rb:188

Failures:

  1) FFI::Inline should load cached libraries
     Failure/Error: inline "void* cached_func() {}"
       (<File (class)>).open("/tmp/.ffi-inline-1000/d9709cf336a8d618ce964e03dc16172be385d749.log", 578, {:encoding=>"ASCII-8BIT"})
           expected: 1 time
           received: 2 times
     # kernel/common/io19.rb:171:in `write'
     # kernel/common/eval19.rb:45:in `instance_eval'
     # kernel/common/eval19.rb:45:in `instance_eval'
     # kernel/bootstrap/array19.rb:18:in `map'
     # kernel/bootstrap/array19.rb:18:in `map'
     # kernel/loader.rb:697:in `run_at_exits'
     # kernel/loader.rb:717:in `epilogue'
     # kernel/loader.rb:850:in `main'

  2) FFI::Inline should allow users to add external libraries
     Failure/Error: inline "int func() { return 0; }", :libraries => ['foolib1', 'foolib2'] do |builder|
     NoMethodError:
       undefined method `new' on nil:NilClass.
     # kernel/delta/kernel.rb:81:in `new (method_missing)'
     # kernel/common/eval19.rb:45:in `instance_eval'
     # kernel/bootstrap/array19.rb:18:in `map'
     # kernel/bootstrap/array19.rb:18:in `map'
     # kernel/loader.rb:697:in `run_at_exits'
     # kernel/loader.rb:717:in `epilogue'
     # kernel/loader.rb:850:in `main'

Finished in 1.13 seconds
14 examples, 2 failures, 1 pending

Failed examples:

rspec ./inline_spec.rb:44 # FFI::Inline should load cached libraries
rspec ./inline_spec.rb:144 # FFI::Inline should allow users to add external libraries
rake aborted!
Command failed with status (1): [rspec inline_spec.rb --color --format doc...]
/home/User/Code/Ruby/gems/FFI/ruby-ffi-inline/Rakefile:9:in `__script__'
kernel/bootstrap/array.rb:68:in `each'
kernel/bootstrap/array.rb:68:in `each'
kernel/bootstrap/array.rb:68:in `each'
kernel/common/kernel.rb:598:in `load'
kernel/common/block_environment.rb:75:in `call_on_instance'
kernel/common/eval.rb:75:in `eval'
/usr/local/rvm/gems/rbx-head@testing/bin/ruby_noexec_wrapper:14:in `__script__'
kernel/delta/codeloader.rb:68:in `load_script'
kernel/delta/codeloader.rb:118:in `load_script'
kernel/loader.rb:615:in `script'
kernel/loader.rb:816:in `main'
Tasks: TOP => default => test
(See full trace by running task with --trace)