Crash when removing layers from project

[Donkagen2]

When removing layers from a large project (e.g. 700k project file) there are two problems: 1) Removing a layer or group of layers can take some time but there is no visual indicator of activity (e.g. cursor change to hourglass) and behaviour seems undefined while the removal is in progress. 2) Sometimes, even without any user activity after the Remove is started, QGIS crashes. Single layers seem to remove (relatively) safely - the problem seems much more likely to occur when deleting groups of layers, especially rasters.

[mayeulk]

I could not make it crash myself with many vector layers (on Kubuntu 10.10), but I noticed the following, which may be related tot he slowness problem:

Having a project with:

• 6 vector layers (shapefiles and postgis connections)
• one group of 10 vector layers (gpx/track)
• one openlayer layer (Google satellite, visible)
• one openlayer layer (OSM, unchecked)

When I deleted the group of gpx/track) vector layers, the map was updated after the removal of each one of the 10 layers (which was quite slow).