rails s ができません。mysql2-0.5.1/lib/mysql2/client.rb:90: [BUG] Segmentatioエラー

###エラー内容
開発中に突然warning: already initialized constant FileUtils::RUBYエラーが出てしまい、ruby、railsを再インストールしました。

そうしたところSegmentation fault at 0x00000000000000と出てしまっています。

どうもmysqlとの紐付けがうまく行ってないのかと思いますが、原因不明です。

rails sをしてもサーバーを起動させることができないでいます。

どなたかご助言をいただけますと幸いです。

発生している問題・エラーメッセージ

vendor/bundle/ruby/2.4.0/gems/mysql2-0.5.1/lib/mysql2/client.rb:90: [BUG] Segmentation fault at 0x00000000000000
ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-darwin16]

-- Crash Report log information --------------------------------------------
   See Crash Report log file under the one of following:                    
     * ~/Library/Logs/DiagnosticReports                                     
     * /Library/Logs/DiagnosticReports                                      
   for more details.                                                        
Don't forget to include the above Crash Report log file in bug reports.     

-- Control frame information -----------------------------------------------
c:0043 p:---- s:0315 e:000314 CFUNC  :connect
c:0042 p:0688 s:0303 e:000302 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/mysql2-0.5.1/lib/mysql2/client.rb:90 [FINISH]
c:0041 p:---- s:0289 e:000288 CFUNC  :new
c:0040 p:0118 s:0284 e:000283 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/connection_adapters/mys
c:0039 p:0028 s:0277 e:000276 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abs
c:0038 p:0027 s:0273 e:000272 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abs
c:0037 p:0025 s:0269 e:000268 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abs
c:0036 p:0018 s:0263 e:000262 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abs
c:0035 p:0016 s:0257 e:000255 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abs
c:0034 p:0042 s:0251 e:000247 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abs
c:0033 p:0046 s:0244 e:000243 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abs
c:0032 p:0015 s:0237 e:000236 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/connection_handling.rb:
c:0031 p:0008 s:0233 e:000232 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/connection_handling.rb:
c:0030 p:0016 s:0229 e:000228 METHOD /Users/fukudashou/Desktop/lance_note/vendor/bundle/ruby/2.4.0/gems/activerecord-5.1.6/lib/active_record/migration.rb:562
c:0029 p:0051 s:0225 e:000223 METHOD /Users/fukudashou/De```

### 該当のソースコード