mat-table: There can only be one default row without a when predicate function.

[ewaschenko]

Bug, feature request, or proposal:

Bug: Following the expandable-rows example in the demo-app, the example fails in Stackblitz since the

<tr mat-row *matRowDef="let row; columns: ['expandedDetail']"
        class="demo-detail-row"></tr>

https://github.com/angular/material2/blob/master/src/demo-app/table/expandable-rows/expandable-rows.html#L23

is missing the when predicate. However, when building and deploying the demo app locally, it works fine.

What is the expected behavior?

The table should behave the same as the expandable-rows component in the demo-app when deployed locally.

What is the current behavior?

The following error is produced:

ERROR
Error: There can only be one default row without a when predicate function.

What are the steps to reproduce?

https://stackblitz.com/edit/expandable-rows-exp

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Material 6.0.1
Angular 6.0.0

[pfeigl]

See this PR #11116

This added multiTemplateDataRows which actually allows to have multiple rows without when predicate, which the demo app already uses.

This is not yet included in 6.0.1.

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