[Qgis-developer] Problems using QgsVectorLayer::selectedFeatures()

[Martin Dobias]

On Mon, Feb 7, 2011 at 12:40 PM, Federico J. Fernández
<federico.fernandez at gmail.com> wrote:
>     QgsFeatureList &featureList = this->currentLayer->selectedFeatures();

You only store reference to a temporary list returned by
selectedFeatures(). That list is destroyed when that function
terminates, so you have an invalid reference. Store the whole list
instead, not just that reference:

QgsFeatureList featureList = .... ;

Your original post actually listed the correct version (without the
reference '&'), that's why it wasn't clear where's your problem.

By the way, QGIS contains a map tool for merging features (in
src/app), so you could save your work by using that code instead of
writing similar code again.

Martin