Add Invalid Layer to QgsLayerTreeGroup crashes QGIS 2.6

[qgib]

Author Name: Akbar Gumbira (Akbar Gumbira)
Original Redmine Issue: 11703
Affected QGIS version: 2.6.0

Assignee: Martin Dobias

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Hi, I know that this isn't the expected scenario. But if we feed QgsLayerTreeGroup with invalid layer, e.g just give it None, it will crash QGIS.

Simple script that can be run in QGIS Python Console :

a = QgsLayerTreeGroup()
a.addLayer(None)

I think throwing Exception is better than not handling it at all

[qgib]

Author Name: Tim Sutton (Tim Sutton)

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• assigned_to_id was changed from Tim Sutton to Martin Dobias

[qgib]

Author Name: Martin Dobias (@wonder-sk)

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Fixed in changeset "f28a6d1d7d426286f67b94b094a6653aec69f0a3".

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• status_id was changed from Open to Closed