Bug: Error casting Speckle Pointcloud to Native type in Grasshopper/Rhino8

[pfmephisto]

Prerequisites

• I read the contribution guidelines
• I checked the documentation and found no answer.
• I checked existing issues and found no similar issue.
• I checked the community forum for related discussions and found no answer.
• I'm reporting the issue to the correct repository (see also speckle-server, speckle-sharp, specklepy, speckle-docs, and others)

What package are you referring to?

This is related to the Grasshopper connector in Rhino8

Describe the bug

The issue occurs when trying to cast a Speckle Pointcloud to a native Rhino/Grasshopper Point Cloud using the Grasshopper Connector.

To Reproduce

Create a point cloud in Grasshopper. Then, cast it to a Speckle base object and attempt to convert it back into a native Rhino/Grasshopper Point Cloud.

Expected behavior

The resulting object should be a native Rhino/ Grasshopper Point Cloud.

Screenshots

System Info

Desktop (please complete the following information):

• OS: Windows 11
• Rhino 8
• Speckle: 2.20.3

Failure Logs

1. Failed to set value for Pointcloud.points
    Object of type 'System.Collections.Generic.List`1[System.Object]' cannot be converted to type 'System.Collections.Generic.List`1[System.Double]'.

[linear]

CNX-689 Bug: Error casting Speckle Pointcloud to Native type in Grasshopper/Rhino8