在尝试为新项目运行 bundle 时，我遇到以下错误：
Installing debugger (1.2.2) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
C:/Ruby193/bin/ruby.exe extconf.rb
checking for rb_method_entry_t.called_id in method.h... no
checking for rb_control_frame_t.method_id in method.h... no
checking for rb_method_entry_t.called_id in method.h... no
checking for rb_control_frame_t.method_id in method.h... no
Makefile creation failed
**************************************************************************
No source for ruby-1.9.3-p362 provided with debugger-ruby_core_source gem.
**************************************************************************
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=C:/Ruby193/bin/ruby
--with-ruby-dir
--without-ruby-dir
--with-ruby-include
--without-ruby-include=${ruby-dir}/include
--with-ruby-lib
--without-ruby-lib=${ruby-dir}/lib
Gem files will remain installed in C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.2.2 for inspection.
Results logged to C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.2.2/ext/ruby_debug/gem_make.out
An error occured while installing debugger (1.2.2), and Bundler cannot continue.
Make sure that `gem install debugger -v '1.2.2'` succeeds before bundling.
运行gem install debugger -v '1.2.2'产生相同的结果。
我检查了 mkmf.log 和 gem_make.out 文件的内容，它们没有什么意义，但如果需要，我会发布它们。
为什么这不起作用？