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Sometimes process can fail to restart

See original GitHub issue

I’ve noticed that when many restarts are triggered in quick succession (for example, by running a git pull), then an error can come up and the watch process will stop monitoring.

Error: Cannot find module './express/app'
    at Function.Module._resolveFilename (module.js:455:15)
    at Function.Module._load (module.js:403:25)
    at Module.require (module.js:483:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/Users/patrick/project/js/config/main.js:7:17)
    at Module._compile (module.js:556:32)
    at babelWatchLoader (/Users/patrick/project/node_modules/babel-watch/runner.js:50:13)
    at Object.require.extensions.(anonymous function) [as .js] (/Users/patrick/project/node_modules/babel-watch/runner.js:61:7)
    at Module.load (module.js:473:32)
    at tryModuleLoad (module.js:432:12)
fs.js:786
    return binding.writeBuffer(fd, buffer, offset, length, position);
                   ^

Error: EPIPE: broken pipe, write
    at Error (native)
    at Object.fs.writeSync (fs.js:786:20)
    at handleFileLoad (/Users/patrick/project/node_modules/babel-watch/babel-watch.js:279:30)
    at handleFileLoad (/Users/patrick/project/node_modules/babel-watch/babel-watch.js:172:7)
    at ChildProcess.app.on (/Users/patrick/project/node_modules/babel-watch/babel-watch.js:273:5)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at process.nextTick (internal/child_process.js:744:12)
    at _combinedTickCallback (internal/process/next_tick.js:67:7)
    at process._tickCallback (internal/process/next_tick.js:98:9)

Normally there is no problem with importing ./express/app - it appears to just be a transient error while the filesystem is changing. However, after this error comes up I need to kill babel-watch and restart it in order for monitoring to continue