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QgsVectorLayer::writeSymbology(): fix crash when called with invalid data provider

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This commit is contained in:
Even Rouault 2016-10-18 22:32:56 +02:00
parent a70d42802f
commit 9ae156970a
1 changed files with 8 additions and 1 deletions
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9
src/core/qgsvectorlayer.cpp
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@ -1947,7 +1947,14 @@ bool QgsVectorLayer::writeSymbology( QDomNode& node, QDomDocument& doc, QString&
mConditionalStyles->writeXml( node, doc );
// save expression fields
mExpressionFieldBuffer->writeXml( node, doc );
if ( !mExpressionFieldBuffer )
{
// can happen when saving style on a invalid layer
QgsExpressionFieldBuffer dummy;
dummy.writeXml( node, doc );
}
else
mExpressionFieldBuffer->writeXml( node, doc );
// save readonly state
node.toElement().setAttribute( QStringLiteral( "readOnly" ), mReadOnly );