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fix crasher when rendering a symbol layer subsequent to
rendering a geometry generator layer

Fixes #19121
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m-kuhn authored and nirvn committed Jul 6, 2018
1 parent 4f8c9e1 commit 5c855b4
Showing 1 changed file with 22 additions and 0 deletions.
22 changes: 22 additions & 0 deletions src/core/symbology/qgssymbol.cpp
Expand Up @@ -688,6 +688,27 @@ class ExpressionContextScopePopper

QgsExpressionContext *context = nullptr;

* RAII class to restore original geometry on a render context on destruction
class GeometryRestorer
GeometryRestorer( QgsRenderContext &context )
: mContext( context ),
mGeometry( context.geometry() )

mContext.setGeometry( mGeometry );

QgsRenderContext &mContext;
const QgsAbstractGeometry *mGeometry;
///@endcond PRIVATE

void QgsSymbol::renderFeature( const QgsFeature &feature, QgsRenderContext &context, int layer, bool selected, bool drawVertexMarker, int currentVertexMarkerType, int currentVertexMarkerSize )
Expand All @@ -698,6 +719,7 @@ void QgsSymbol::renderFeature( const QgsFeature &feature, QgsRenderContext &cont

GeometryRestorer geomRestorer( context );
QgsGeometry segmentizedGeometry = geom;
bool usingSegmentizedGeometry = false;
context.setGeometry( geom.constGet() );
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@nirvn nirvn commented on 5c855b4 Jul 7, 2018

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@m-kuhn , before I forget: we need to backport this to 3.2.

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