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Quick fix for a bug in QgsGeos::reshapeLine that causes QGIS to crash because of an unhandled geos exception.

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This commit is contained in:
uclaros 2019-02-23 20:50:52 +02:00
parent ddb589a3c8
commit 03db73d9f1
2 changed files with 13 additions and 1 deletions
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2
src/core/geometry/qgsgeos.cpp
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@ -2344,7 +2344,7 @@ static geos::unique_ptr _mergeLinestrings( const GEOSGeometry *line1, const GEOS
return nullptr;
bool intersectionAtOrigLineEndpoint =
( intersectionPoint.x() == x1 && intersectionPoint.y() == y1 ) ||
( intersectionPoint.x() == x1 && intersectionPoint.y() == y1 ) !=
( intersectionPoint.x() == x2 && intersectionPoint.y() == y2 );
bool intersectionAtReshapeLineEndpoint =
( intersectionPoint.x() == rx1 && intersectionPoint.y() == ry1 ) ||

12
tests/src/python/test_qgsgeometry.py
View File

@ -2334,6 +2334,18 @@ class TestQgsGeometry(unittest.TestCase):
wkt = g.asWkt()
assert compareWkt(expWkt, wkt), "testReshape failed: mismatch Expected:\n%s\nGot:\n%s\n" % (expWkt, wkt)
# Test reshape a polygon with a line starting or ending at the polygon's first vertex, no change expexted
g = QgsGeometry.fromWkt('Polygon ((0 0, 1 0, 1 1, 0 1, 0 0))')
expWkt = g.asWkt()
g.reshapeGeometry(QgsLineString([QgsPoint(0, 0), QgsPoint(-1, -1)]))
assert compareWkt(g.asWkt(), expWkt), "testReshape failed: mismatch Expected:\n%s\nGot:\n%s\n" % (expWkt, wkt)
# Test reshape a polygon with a line starting or ending at the polygon's first vertex
g = QgsGeometry.fromWkt('Polygon ((0 0, 1 0, 1 1, 0 1, 0 0))')
g.reshapeGeometry(QgsLineString([QgsPoint(0, 0), QgsPoint(0.5, 0.5), QgsPoint(0, 1)]))
expWkt = 'Polygon ((0 0, 1 0, 1 1, 0 1, 0.5 0.5, 0 0))'
assert compareWkt(g.asWkt(), expWkt), "testReshape failed: mismatch Expected:\n%s\nGot:\n%s\n" % (expWkt, wkt)
# Test reshape a line from first/last vertex
g = QgsGeometry.fromWkt('LineString (0 0, 5 0, 5 1)')
# extend start