bindings to concrete types not propagating correctly from template to collection

[sjmiles]

Given:

     <template is="dom-repeat" items="{{somethings}}">
        <paper-input value="{{item}}"></paper-input>
      </template>

changes to paper-input.valueappear in template.getModelForElement(paper-input).item but not in template.items[n].

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

[pvmart]

Might be related.
Overwriting an object in array with the new one destroys binding.

         this.push('test', {value: 1});
         this.set('test.0.value',  2);
         this.set('test.0',{value: 3});
         this.set('test.0.value',  4);

The result is 3 but in the model is 4.
http://plnkr.co/edit/AH5SKoedUQgeyfBgsfWL?p=preview

[kevinpschaaf]

@pvmart Yep, they are the same root cause. A fix is in the works that should solve both this and #1854.

[kevinpschaaf]

This should be fixed by PR #1855.

Confirmed it fixes repro case here:
http://jsbin.com/ziseru/2/edit

[kevinpschaaf]

Root cause here w.r.t. notifying based on individual dom-repeat instances' item changng was fixed in #1854.

Note related issue opened here: #1913, regarding problems when primitive values are duplicated in the array.