Catch inverse transform failures in raster reprojector. Fix for #5895

Author: homann

src/core/qgsrasterprojector.cpp

@@ -594,10 +594,21 @@ bool QgsRasterProjector::checkCols()
       QgsPoint mySrcPoint3 = mCPMatrix[r+1][c];
 
       QgsPoint mySrcApprox(( mySrcPoint1.x() + mySrcPoint3.x() ) / 2, ( mySrcPoint1.y() + mySrcPoint3.y() ) / 2 );
-      QgsPoint myDestApprox = mCoordinateTransform.transform( mySrcApprox, QgsCoordinateTransform::ReverseTransform );
-      double mySqrDist = myDestApprox.sqrDist( myDestPoint );
-      if ( mySqrDist > mSqrTolerance )
-        return false;
+      try
+      {
+	QgsPoint myDestApprox = mCoordinateTransform.transform( mySrcApprox, QgsCoordinateTransform::ReverseTransform );
+	double mySqrDist = myDestApprox.sqrDist( myDestPoint );
+	if ( mySqrDist > mSqrTolerance )
+	{
+	  return false;
+	}
+      }
+      catch ( QgsCsException &e )
+      {
+	Q_UNUSED( e );
+	// Caught an error in transform
+	return false;
+      }
     }
   }
   return true;
@@ -618,10 +629,21 @@ bool QgsRasterProjector::checkRows()
       QgsPoint mySrcPoint3 = mCPMatrix[r][c+1];
 
       QgsPoint mySrcApprox(( mySrcPoint1.x() + mySrcPoint3.x() ) / 2, ( mySrcPoint1.y() + mySrcPoint3.y() ) / 2 );
-      QgsPoint myDestApprox = mCoordinateTransform.transform( mySrcApprox, QgsCoordinateTransform::ReverseTransform );
-      double mySqrDist = myDestApprox.sqrDist( myDestPoint );
-      if ( mySqrDist > mSqrTolerance )
-        return false;
+      try
+      {
+	QgsPoint myDestApprox = mCoordinateTransform.transform( mySrcApprox, QgsCoordinateTransform::ReverseTransform );
+	double mySqrDist = myDestApprox.sqrDist( myDestPoint );
+	if ( mySqrDist > mSqrTolerance )
+	{
+	  return false;
+	}
+      }
+      catch ( QgsCsException &e )
+      {
+	Q_UNUSED( e );
+	// Caught an error in transform
+	return false;
+      }
     }
   }
   return true;