iOS Rubyで問題が発生し、Podをインストールできませんでした

Ruby異常
iTermにpodをインストール:pod install実行後、次の情報が表示されます.

/Users/gm/.rvm/gems/ruby-2.2.0/gems/json-1.8.3/lib/json/ext/parser.bundle: [BUG] Segmentation fault at 0x00000000000418

ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin13]



-- Crash Report log information --------------------------------------------

   See Crash Report log file under the one of following:

     * ~/Library/Logs/CrashReporter

     * /Library/Logs/CrashReporter

     * ~/Library/Logs/DiagnosticReports

     * /Library/Logs/DiagnosticReports

   for more details.



-- Control frame information -----------------------------------------------

c:0032 p:-17578000109434 s:0143 e:000142 TOP    [FINISH]

c:0031 p:---- s:0141 e:000140 CFUNC  :require

c:0030 p:0160 s:0137 e:000136 METHOD /Users/gm/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:68

c:0029 p:0009 s:0127 e:000126 CLASS  /Users/gm/.rvm/gems/ruby-2.2.0/gems/json-1.8.3/lib/json/ext.rb:13

異常情報:/Users/gm/rvm/gems/ruby-2.2.0/gems/json-1.8.3/lib/json/ext/parser.bundle
二解決方法
再ロードjson

newsapp 10 6 git:(leisheng/change_status) ✗ gem install json