blockMesh wrong with BSpline

BSpline function in blockMesh may encounter problems. It seems to work well with 1 block. However, when another block is added, the control point is also added to the mesh. The control point is (-1 1 0). IF I change to (-1 1.0001 0), it comes back to the correct mesh.

• OpenFOAM version :7
• Operating system :Linux

xxx1

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