Manipulating with columns leads to "Assertion Failed: Cannot create a new chain watcher for `<(unknown):ember1140>` after it has been destroyed."

[bedrosenator]

In component I tried to render(or not) cell depending on isVisible value I got an error "Assertion Failed: Cannot create a new chain watcher for <(unknown):ember1140> after it has been destroyed."

    {{#h.row as |r|}}
      {{#if r.columnValue.isVisible}}
        {{#r.cell
          as |column|
        }}
          {{#if column.headerComponent}}

            {{#component
              column.headerComponent
              clickAction=(action (if column.headerComponentAction column.headerComponentAction 'headerClickAction') column.valuePath column.isSortable)
              className=column.className
            }}
              {{column.name}}
            {{/component}}

          {{else}}
            {{column.name}}
          {{/if}}

        {{/r.cell}}
        {{/if}}
    {{/h.row}}


    {{#if r.columnValue.isVisible}}
        {{#r.cell
          onClick=tableClick
        as |cell column row cellMeta columnMeta rowMeta|
        }}

          {{#if column.cellComponent}}
            {{component column.cellComponent className=column.className}}
          {{else}}
            {{cell}}
          {{/if}}

        {{/r.cell}}
      {{/if}}

[miketervela]

Are your rows an ember-data hasMany? Could one of them have been unloaded before the error? There are some open issues with that in Ember Data right now. Might apply to peekAll recordArrays too

[bantic]

@bedrosenator When you have a chance, can you try upgrading to 2.0.0-beta.8 (or a newer release if applicable) and see if that fixes your issue?