title: ruby-debug-base19 :Failed to build
body: <p>I ran the following command to install the gems</p>
  
  <pre><code>bundle install --without production
  </code></pre>
  
  <p>It started the installation untill it reached ruby-debug-base19 .When it tried to install it should the following error</p>
  
  <pre><code>Installing ruby-debug-base19 (0.11.25)
  Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
  
  /usr/bin/ruby.exe extconf.rb
  checking for rb_method_entry_t.body in method.h... no
  checking for vm_core.h... no
  /usr/lib/ruby/gems/1.9.1/gems/ruby_core_source-0.1.5/lib/ruby_core_source.rb:39: Use RbConfig instead of obsolete and deprecated Config.
  checking for rb_method_entry_t.body in method.h... no
  checking for vm_core.h... yes
  checking for iseq.h... yes
  checking for insns.inc... yes
  checking for insns_info.inc... yes
  checking for eval_intern.h... yes
  creating Makefile
  
  make
  gcc -I. -I/usr/include/ruby-1.9.1/i386-cygwin -I/usr/include/ruby-1.9.1/ruby/backward -I/usr/include/ruby-1.9.1 -I. -DHAVE_VM_CORE_H -DHAVE_ISEQ_H -DHAVE_INSNS_INC -DHAVE_INSNS_INFO_INC -DHAVE_EVAL_INTERN_H -I/usr/include/ruby-1.9.1/ruby-1.9.3-p429 -ggdb -O2 -pipe   -fno-strict-aliasing  -o breakpoint.o -c breakpoint.c
  gcc -I. -I/usr/include/ruby-1.9.1/i386-cygwin -I/usr/include/ruby-1.9.1/ruby/backward -I/usr/include/ruby-1.9.1 -I. -DHAVE_VM_CORE_H -DHAVE_ISEQ_H -DHAVE_INSNS_INC -DHAVE_INSNS_INFO_INC -DHAVE_EVAL_INTERN_H -I/usr/include/ruby-1.9.1/ruby-1.9.3-p429 -ggdb -O2 -pipe   -fno-strict-aliasing  -o ruby_debug.o -c ruby_debug.c
  ruby_debug.c:29:19: error: conflicting types for ‘rb_iseq_compile_with_option’
  In file included from ruby_debug.c:4:0:
  /usr/include/ruby-1.9.1/ruby-1.9.3-p429/vm_core.h:506:7: note: previous declaration of ‘rb_iseq_compile_with_option’ was here
  Makefile:206: recipe for target `ruby_debug.o' failed
  make: *** [ruby_debug.o] Error 1
  
  
  Gem files will remain installed in /usr/lib/ruby/gems/1.9.1/gems/ruby-debug-base19-0.11.25 for inspection.
  Results logged to /usr/lib/ruby/gems/1.9.1/gems/ruby-debug-base19-0.11.25/ext/ruby_debug/gem_make.out
  
  An error occurred while installing ruby-debug-base19 (0.11.25), and Bundler cannot continue.
  Make sure that `gem install ruby-debug-base19 -v '0.11.25'` succeeds before bundling.
  </code></pre>
  
  <p>What is the reason for this error and how can it be resolved?</p>