md-tab md-on-select not firing.

[patrick-martin-shoutpoint]

Since the update from 0.8.4 to 0.9-rcx, the expression in "md-on-select" is not executing.

In my code, tabIndex is not being set.

    <md-tabs>
        <md-tab label="Upcoming Meetings" md-on-select="tabIndex = 1"></md-tab>
        <md-tab label="Past Meetings" md-on-select="tabIndex = 2"></md-tab>
    </md-tabs>