Swiper Error Cannot read property 'length' of undefined

[blanchg]

Ionic version: (check one with "x")
[x] 3.x

I'm submitting a ... (check one with "x")
[x] bug report

Current behavior:
Updating the data in an ion-list that contains an ion-slides causes a console error.

ERROR TypeError: Cannot read property 'length' of undefined
    at destroyLoop (swiper.ts:696)
    at Object.destroySwiper (swiper.ts:1002)
    at Slides.ngOnDestroy (slides.ts:1162)
    at callProviderLifecycles (query.ts:1)
    at callElementProvidersLifecycles (provider.ts:619)
    at callLifecycleHooksChildrenFirst (provider.ts:603)
    at destroyView (view.ts:642)
    at callWithDebugContext (services.ts:815)
    at Object.debugDestroyView [as destroyView] (services.ts:404)
    at ViewContainerRef_.remove (refs.ts:357)

Expected behavior:

Updating the data should not cause errors.

Steps to reproduce:

http://embed.plnkr.co/9RfxERbAm9PvR9DvJ5PJ/

Double click the update button and the error above will log to the console

Related code:
See Plnkr

Other information:

This could be fixed by testing for s._slides in ionic/src/components/slides/swiper/swiper.ts

function destroyLoop(s: Slides) {
  eachChild(s._wrapper, '.' + CLS.slide + '.' + CLS.slideDuplicate, ele => {
    ele.parentElement.removeChild(ele);
  });
  if (s._slides) {
    for (var i = 0; i < s._slides.length; i++) {
      s._slides[i].removeAttribute('data-swiper-slide-index');
    }
  }
}

Ionic info: (run ionic info from a terminal/cmd prompt and paste output below):

[kensodemann]

Hello! Thank you for opening an issue with us!

A fix for this has been committed and will be in the next 3.6.x release.

Thank you for using Ionic

[kensodemann]

We have created an ionic-angular@nightly with the fix for this issue included in preparation for a new release. I have tested it via the sample repo and it works for that particular case. If you would like to try this in your app you can use npm install ionic-angular@nightly

[blanchg]

Excellent thank you

…

On 7 Sep. 2017 5:36 am, "Ken Sodemann" ***@***.***> wrote: We have created an ***@***.*** with the fix for this issue included in preparation for a new release. I have tested it via the sample repo and it works for that particular case. If you would like to try this in your app you can use npm install ***@***.*** — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#12791 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAFR39Rk7o3XAabz3b7GBNbkCzEJf1xsks5sfvQwgaJpZM4PJiXg> .

[ionitron-bot]

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