Timeline - Uncaught TypeError: Cannot read property 'height' of undefined

Hi all,

First I want to say how much I love vis.js library, it saved me months of time to developp a timeline like yours.

I got an error Error on visjs 4.16.1 and 4.18.0 when i try to move a subgrouped item in another group :

vis.js:21715 Uncaught TypeError: Cannot read property 'height' of undefined
    at http://localhost:63342/rms/bower_components/vis/dist/vis.js:21715:94
    at Object.exports.forEach (http://localhost:63342/rms/bower_components/vis/dist/vis.js:718:9)
    at Group._calculateSubGroupHeights (http://localhost:63342/rms/bower_components/vis/dist/vis.js:21713:12)
    at Group.redraw (http://localhost:63342/rms/bower_components/vis/dist/vis.js:21635:10)
    at http://localhost:63342/rms/bower_components/vis/dist/vis.js:19374:32
    at Object.exports.forEach (http://localhost:63342/rms/bower_components/vis/dist/vis.js:724:11)
    at ItemSet.redraw (http://localhost:63342/rms/bower_components/vis/dist/vis.js:19372:10)
    at http://localhost:63342/rms/bower_components/vis/dist/vis.js:18495:27
    at Array.forEach (native)
    at Timeline.Core._redraw (http://localhost:63342/rms/bower_components/vis/dist/vis.js:18494:21)

If I catch this error I got another one on line 22179 and when I catch the second (in a console.warn) all looks good.

How can i fix it ?

[blin4444]

I'm receiving possibly related errors after upgrading from 4.17.0 to 4.18.0. Needed to downgrade back to 4.17.0.

[Error] Error: undefined is not an object (evaluating 'orderedItems[Math.max(0, middle - 1)]')
      binarySearchValue@[domain]/js/bundle.js:77492:31
      _getRelevantData@[domain]/js/bundle.js:106123:57
      _updateGraph@[domain]/js/bundle.js:105944:30
      redraw@[domain]/js/bundle.js:105879:34
      [domain]/js/bundle.js:105432:21
      emit@[domain]/js/bundle.js:87930:27
      [native code]
      setRange@[domain]/js/bundle.js:95487:31
      setOptions@[domain]/js/bundle.js:95344:22
      forEach@[native code]
      setOptions@[domain]/js/bundle.js:97046:28
      setOptions@[domain]/js/bundle.js:105112:35
      [domain]/js/bundle.js:135085:33
      $watchCollectionAction@[domain]/js/bundle.js:27939:21
      $digest@[domain]/js/bundle.js:28076:25
      $apply@[domain]/js/bundle.js:28342:31
      [domain]/js/bundle.js:135419:28
      $emit@[domain]/js/bundle.js:28487:38
      [domain]/js/bundle.js:135369:27
      [domain]/js/bundle.js:62001:24
      applyAsyncOrDigest@[domain]/js/bundle.js:10123:25
      _onMessageHandler@[domain]/js/bundle.js:10112:29
      (anonymous function) (bundle.js:21099)
      $digest (bundle.js:28094)
      $apply (bundle.js:28342)
      (anonymous function) (bundle.js:135419)
      $emit (bundle.js:28487)
      (anonymous function) (bundle.js:135369)
      (anonymous function) (bundle.js:62001)
      applyAsyncOrDigest (bundle.js:10123)
      _onMessageHandler (bundle.js:10112)

[yotamberk]

@jtissier @blin4444 I am not able to reproduce this bug...
Can you please supply a jsbin with an example with this error popping up?

[mojoaxel]

Looking at the subgroups example I can not reproduce this, by tracking any item to another group.
@@jtissier @blin4444 Please provide a way for us to reproduce this. Thx!