title: ionic build error code 137
body: <p>I am trying to build my app for android. It built fine for the first time but there were some typos in first so i edited the html and now i am trying to build the app. It is giving an error with exit status 137. the nodejs is latest so is the npm. I have checked the memory approx 700mb available. 
  New to ionic so now i cannot figure out the mistake.
  Also rebuilded the node-sass. Nothing is working.
  it takes too much time after sass started and then gets killed automatically. </p>
  
  <p>Attaching the debug file  </p>
  
  <pre><code>14 verbose stack Exit status 137
  14 verbose stack     at EventEmitter.&lt;anonymous&gt; (/usr/lib/node_modules/npm/lib/utils/lifecycle.js:279:16)
  14 verbose stack     at emitTwo (events.js:106:13)
  14 verbose stack     at EventEmitter.emit (events.js:191:7)
  14 verbose stack     at ChildProcess.&lt;anonymous&gt; (/usr/lib/node_modules/npm/lib/utils/spawn.js:40:14)
  14 verbose stack     at emitTwo (events.js:106:13)
  14 verbose stack     at ChildProcess.emit (events.js:191:7)
  14 verbose stack     at maybeClose (internal/child_process.js:886:16)
  14 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5)
  15 verbose pkgid ionic-hello-world@
  16 verbose cwd /home/ubuntu/files/ic2017app
  17 verbose Linux 4.4.0-64-generic
  18 verbose argv "/usr/bin/nodejs" "/usr/bin/npm" "run" "ionic:build" "--" "--v2"
  19 verbose node v6.10.1
  20 verbose npm  v4.4.4
  21 error code ELIFECYCLE
  22 error errno 137
  23 error ionic-hello-world@ ionic:build: `ionic-app-scripts build "--v2"`
  23 error Exit status 137
  24 error Failed at the ionic-hello-world@ ionic:build script 'ionic-app-scripts build "--v2"'.
  24 error Make sure you have the latest version of node.js and npm installed.
  24 error If you do, this is most likely a problem with the ionic-hello-world package,
  24 error not with npm itself.
  24 error Tell the author that this fails on your system:
  24 error     ionic-app-scripts build "--v2"
  24 error You can get information on how to open an issue for this project with:
  24 error     npm bugs ionic-hello-world
  24 error Or if that isn't available, you can get their info via:
  24 error     npm owner ls ionic-hello-world
  24 error There is likely additional logging output above.
  25 verbose exit [ 137, true ]
  </code></pre>