Killed
error Command failed with exit code 137.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
/home/travis/build/prettier/prettier/node_modules/shelljs/src/common.js:417
      if (config.fatal) throw e;
                        ^
Error: exec: internal error
    at Object.error (/home/travis/build/prettier/prettier/node_modules/shelljs/src/common.js:128:27)
    at Object._exec (/home/travis/build/prettier/prettier/node_modules/shelljs/src/exec.js:292:12)
    at Object.exec (/home/travis/build/prettier/prettier/node_modules/shelljs/src/common.js:350:23)
    at Object.<anonymous> (/home/travis/build/prettier/prettier/scripts/test-dist.js:23:20)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Function.Module.runMain (module.js:441:10)
    at startup (node.js:140:18)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.