Bug report #3686: infinite loop - QGIS Application - QGIS Issue Tracking

Bug report #3686

infinite loop

Added by Sandro Santilli over 13 years ago. Updated almost 12 years ago.

Status:	Closed
Priority:	Low
Assignee:	-
Category:	Symbology
Affected QGIS version:	master	Regression?:	No
Operating System:	Debian	Easy fix?:	No
Pull Request or Patch supplied:	No	Resolution:	worksforme
Crashes QGIS or corrupts data:	No	Copied to github as #:	13745

Description

I got qgis 1.7.0 enter an infinite loop in main gui.
Attached gdb and saw it being in pal::LabelPosition::getCost(), pretty much every time I did break it.

I know, this bug report sucks... sorry about that.
Next time I'll try to debug more.

History

#1 Updated by Sandro Santilli over 13 years ago

Oh, here's some more, in the screen buffer:

(gdb) bt
#0  0x00007fc75e9ee107 in pal::LabelPosition::getCost() const ()
   from /usr/local/lib/libqgis_core.so.1.7.0
#3905  0x00007fc75e9e37aa in pal::CostCalculator::finalizeCandidatesCosts(pal::Feats*, int, pal::RTree<pal::PointSet*, double, 2, double, 8, 4>*, double*, double*) () from /usr/local/lib/libqgis_core.so.1.7.0
#3906  0x00007fc75e9f7fe4 in pal::Pal::extract(int, char**, double*, double, double, double, double, double, std::basic_ofstream<char, std::char_traits<char> >*)
    () from /usr/local/lib/libqgis_core.so.1.7.0
#3907  0x00007fc75e9f8982 in pal::Pal::extractProblem(double, double*) ()
   from /usr/local/lib/libqgis_core.so.1.7.0
#3908  0x00007fc75e91dc11 in [[QgsPalLabeling]]::drawLabeling(QgsRenderContext&) ()
   from /usr/local/lib/libqgis_core.so.1.7.0
#3909  0x00007fc75e90fdf7 in [[QgsMapRenderer]]::render(QPainter*) ()
   from /usr/local/lib/libqgis_core.so.1.7.0

#2 Updated by Martin Dobias over 13 years ago

Could you please post a sample shapefile that exhibits this behavior?

Isn't that a polygon layer with very complex shapes? (that might take a long time, but not infinite).

Martin

#3 Updated by Sandro Santilli over 13 years ago

Eh, not easy to reproduce. I was checking postgis tables, very simple shapes from example topologies. It could be the data disappeared during the run ...
Doesn't seem to depend on dataset as on second run it worked fine.