[QGIS-trac] Re: [Quantum GIS] #1945: [Vista] Qgis crashes removing GRASS raster layer from map canvas

[Quantum GIS]

#1945: [Vista] Qgis crashes removing GRASS raster layer from map canvas
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        Reporter:  juanelz                                    |         Owner:  rugginoso    
            Type:  bug                                        |        Status:  closed       
        Priority:  critical: causes crash or data corruption  |     Milestone:  Version 1.5.0
       Component:  GRASS                                      |       Version:  HEAD         
      Resolution:  fixed                                      |      Keywords:  GRASS rasters
Platform_version:  Vista                                      |      Platform:  Windows      
        Must_fix:  Yes                                        |   Status_info:  0            
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Comment (by rblazek):

 Replying to [comment:17 lutra]:
 {{{
  Traceback (most recent call last):
    File "/home/vania/.qgis//python/plugins/valuetool/valuewidget.py", line
 134, in printValue
      self.ymin=min(self.ymin,cstr.minimumValue())
  AttributeError: 'NoneType' object has no attribute 'minimumValue'
 }}}

 I have looked into the valuewidget.py, it is using
 layer.contrastEnhancement, but it knows nothing about providers. Current
 support for raster providers is just a hack for WMS. It cannot be fixed in
 GRASS raster provider.

 I can only recommend you to dont use valuetool with GRASS rasters (and
 probably WMS).

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/1945#comment:23>
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Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats