Bug report #16198
QgsGeometry().asPolygon() segfaults, Python, SIP
Status: | Closed | ||
---|---|---|---|
Priority: | High | ||
Assignee: | - | ||
Category: | Python plugins | ||
Affected QGIS version: | master | Regression?: | No |
Operating System: | Easy fix?: | No | |
Pull Request or Patch supplied: | No | Resolution: | fixed/implemented |
Crashes QGIS or corrupts data: | Yes | Copied to github as #: | 24108 |
Description
calling the asPolygon() member function of any QgsGeometry in Python (on the console and from within a plugin) produces a segmentation fault
To reproduce it, run the following two lines on the python console:
geometry = QgsGeometry().fromWkt("Polygon((0 0,10 0,10 10,0 10, 0 0))") polygon = geometry.asPolygon()
I am running Python 3.6 and PyQt 5.7.1
The backtrace is from a CMAKE_BUILD_TYPE=Release binary, I am in the middle of compiling a Debug binary
History
#1
Updated by Nyall Dawson over 7 years ago
No crash here (python 3.6/qt 5.7.1). Likely a local build or library issue...
#2
Updated by Christoph Fink over 7 years ago
- Status changed from Open to Closed
Indeed, I cannot reproduce it any more in any other enviroment than Arch with qgis-git from AUR.
I’ll try to figure out which dependency is the culprit and file it as a bug with the AUR-package maintainer.
#3
Updated by Christoph Fink over 7 years ago
- Status changed from Closed to Reopened
Reopening because it seems to affect the osgeo4w qgis-dev build, too, in case of MultiPolygons:
wkt = 'MultiPolygon (((0 0,10 0,10 10,0 10, 0 0)))' geometry = QgsGeometry().fromWkt(wkt) print(repr(geometry.isMultipart())) multiPolygon = geometry.asMultiPolygon()
minidump attached, no idea how to debug it on Windows
#4
Updated by Christoph Fink over 7 years ago
- File qgis-20170219-131239-760-3776-3496871.zip added
#5
Updated by Christoph Fink over 7 years ago
- File sysinfo.txt
added
#6
Updated by Giovanni Manghi over 7 years ago
- OS version deleted (
up-to-date as of 2016-02-16, 24) - Operating System deleted (
Arch, Fedora) - Target version set to Version 3.0
- Priority changed from Normal to High
- Description updated (diff)
Christoph Fink wrote:
Reopening because it seems to affect the osgeo4w qgis-dev build, too, in case of MultiPolygons:
confirmed on master/qgis3.
#7
Updated by Giovanni Manghi over 7 years ago
- Regression? set to No
- Easy fix? set to No
#8
Updated by Matthias Kuhn over 7 years ago
No crash here (QGIS 2.99 / QGIS 2.18) with multipolygon (Linux, Fedora 25)
#9
Updated by Giovanni Manghi over 7 years ago
- Status changed from Reopened to Feedback
#10
Updated by Wei Ji Leong about 7 years ago
Giovanni Manghi wrote:
Christoph Fink wrote:
Reopening because it seems to affect the osgeo4w qgis-dev build, too, in case of MultiPolygons:
confirmed on master/qgis3.
Crashes on Windows (Python 3.6.0, Qt 5.7.1) osgeo4w installed qgis-dev build e505ebc. Appears to be only limited to Polygons and Multipolygons. E.g. QgsGeometry().fromWkt("LineString(0 0,10 0,10 10,0 10, 0 0)").asPolyline() works without crashing.
Temp hacky workaround:geometry = QgsGeometry().fromWkt("Polygon((0 0,10 0,10 10,0 10, 0 0))")
geometry.asPolygon() #crashes
[(node.x(), node.y()) for node in geometry.asQPolygonF()] #works
#11
Updated by Giovanni Manghi over 6 years ago
No crash anymore on latest QGIS 3 on Windows. Please leave feedback.
#12
Updated by Christoph Fink over 6 years ago
No crash on QGIS Master (git commit 345088c863) on Linux (Qt 5.10, Python 3.6.4) either. Thank you!
#13
Updated by Giovanni Manghi over 6 years ago
- Status changed from Feedback to Closed
- Resolution set to fixed/implemented