新しいプロジェクトのバンドルを実行しようとすると、次のエラーが発生します。
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.
実行gem install debugger -v '1.2.2'しても同じ結果が得られます。
mkmf.log と gem_make.out ファイルの内容を確認しましたが、ほとんど意味がありませんが、要求があれば投稿します。
なぜこれが機能しないのですか?