Sandcastle example: open any basic shape (e.g. Rectangle) and try to set an outlineWidth, or search "outlineWidth" on this tracker and read any of a bunch of existing issues, starting with #40 (!)

Browser: any

Operating System: Windows only, apparently

Since the very beginning of Cesium, people have been trying to use the outlineWidth property on EllipseGraphics, RectangleGraphics, Po

https://github.com/donmccurdy/glTF-Generator-Registry

In addPipelineExtras, a _pipeline object with a source is added to the extras of each buffer, so it can be used in https://github.com/CesiumGS/gltf-pipeline/blob/47e25f05dcb86d271675f9b5fa5be8dee8205b55/lib/mergeBuffers.js#L29

If a custom stage adds a buffer, it will not have a extras._pipeline object and therefore, will cause a crash in the line above.

A possible solution would

We need to change the unit of the input.