Run time assertion in eigen/src/Core/Block.h while using pcl::NormalEstimation

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I am using diamondback version of ROS on Ubuntu 10.10. I am trying to estimate the normals of the point cloud using pcl::NormalEstimation class. But on running the code, I get runtime assertion on line 278 of the Block.h file. Here's the console output:

/opt/ros/diamondback/stacks/geometry/eigen/include/Eigen/src/Core/Block.h:278: 
Eigen::Block<XprType, BlockRows, BlockCols, InnerPanel, true>
::Block(XprType&, typename Eigen::internal::
traits<Eigen::Block<XprType, BlockRows, BlockCols, InnerPanel, true> >::Index) 
[with XprType = Eigen::Matrix<float, 3, 3, 0, 3, 3>, 
int BlockRows = 3, int BlockCols = 1, bool InnerPanel = true]: 
Assertion `(i>=0) && ( ((BlockRows==1) && (BlockCols==XprType::ColsAtCompileTime) 
&& i<xpr.rows()) ||((BlockRows==XprType::RowsAtCompileTime) && (BlockCols==1) 
&& i<xpr.cols()))' failed.

Does anybody know why this might be happening?