- 当执行npm install -g yarn react-native-cli命令时遇到了如下报错，先执行如下命令clean cache后，再执行npm install -g yarn react-native-cli不再报错
npm cache clean --force
错误如下：
82 verbose stack SyntaxError: Unexpected end of input at 1:10970
82 verbose stack dependencies":{"glob":"^4.4.2"},"bin":{"rimraf":"./bin.js"},"director
82 verbose stack ^
82 verbose stack at Object.parseJSON (/usr/local/lib/node_modules/npm/node_modules/pacote/node_modules/make-fetch-happen/node_modules/node-fetch-npm/node_modules/json-parse-helpfulerror/node_modules/jju/lib/parse.js:745:13)
82 verbose stack at parse (/usr/local/lib/node_modules/npm/node_modules/pacote/node_modules/make-fetch-happen/node_modules/node-fetch-npm/node_modules/json-parse-helpfulerror/index.js:10:13)
82 verbose stack at consumeBody.call.then.buffer (/usr/local/lib/node_modules/npm/node_modules/pacote/node_modules/make-fetch-happen/node_modules/node-fetch-npm/src/body.js:96:50)
82 verbose stack at <anonymous>
82 verbose stack at process._tickCallback (internal/process/next_tick.js:188:7)
83 verbose cwd /Users/mourui/.Trash
84 verbose Darwin 16.4.0
85 verbose argv "/usr/local/Cellar/node/8.2.1/bin/node" "/usr/local/bin/npm" "install" "-g" "yarn" "react-native-cli"
86 verbose node v8.2.1
87 verbose npm v5.3.0
88 error Unexpected end of input at 1:10970
88 error dependencies":{"glob":"^4.4.2"},"bin":{"rimraf":"./bin.js"},"director
88 error ^
89 verbose exit [ 1, true ]
