Uncaught TypeError When splicing an array into emptiness

[andrepl]

This appears to happen when the last element of an array is spliced out using the array manipulation helper 'splice'.

Uncaught TypeError: Cannot read property '0' of null
    Polymer._detachRow @ polymer.html:3425
    (anonymous function) @ polymer.html:3409
    Polymer._applySplicesArraySort @ polymer.html:3407
    Polymer._render @ polymer.html:3278
    Polymer.Templatizer._flushTemplates @ polymer.html:2900
    Polymer.Debounce.Debouncer.complete @ polymer.html:847
    atEndOfMicrotask @ polymer.html:808

[kevinpschaaf]

I'm having trouble reproducing. Could you try modifying this jsBin to cause the problem you're seeing? Thanks!

http://jsbin.com/yeqapupuza/2/edit

[andrepl]

Turns out it's related to nested repeats and removing the parent item when its list of children is empty, so it's a bit more complicated to reproduce, but this appears to do it.

http://jsbin.com/hukoponuna/2/edit?html,console,output

[kevinpschaaf]

Perfect, thanks for the repro.

I confirmed this issue will be solved by the fix in #1629, which should be merged shortly.

Here is your jsbin using that branch, for confirmation:
http://jsbin.com/tikayu/2/edit