Rumble stack script stalled, errors

rumblestackscripterrors

Setting up libtinfo-dev (5.9-4) ...
Setting up libreadline6-dev (6.2-8) ...
Setting up libreadline-dev (6.2-8) ...
Installing: Ruby
--2012-10-13 00:07:21--  ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p194.tar.gz
           => `ruby-1.9.3-p194.tar.gz'
Resolving ftp.ruby-lang.org (ftp.ruby-lang.org)... 221.186.184.68
Connecting to ftp.ruby-lang.org (ftp.ruby-lang.org)|221.186.184.68|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD (1) /pub/ruby/1.9 ... done.
==> SIZE ruby-1.9.3-p194.tar.gz ... 12432239
==> PASV ... done.    ==> RETR ruby-1.9.3-p194.tar.gz ... done.
Length: 12432239 (12M) (unauthoritative)

100%[======================================>] 12,432,239   494K/s   in 16s

2012-10-13 00:07:39 (757 KB/s) - `ruby-1.9.3-p194.tar.gz' saved [12432239]

configure: WARNING: unrecognized options: --disable-ucontext
configure: WARNING: unrecognized options: --disable-ucontext

ffi.h is missing. Please install libffi.
old_thread_select.c: In function 'old_thread_select':
old_thread_select.c:57:5: warning: 'rb_thread_select' is deprecated (declared at ../../.././include/ruby/intern.h:379) [-Wdeprecated-declarations]



lib/irb/inspector.rb:36:36: Couldn't find INSPECTORS. Assuming it's a module
lib/mkmf.rb:1117:29: Couldn't find STRING_OR_FAILED_FORMAT. Assuming it's a module
Enclosing class/module 'mDigest' for class MD5 not known
Enclosing class/module 'mDigest' for class RMD160 not known
Enclosing class/module 'mDigest' for class SHA1 not known
Enclosing class/module "cASN1ObjectId" for alias short_name sn not known
Enclosing class/module "cASN1ObjectId" for alias long_name ln not known