In the attached, call ReplaceEdge and choose the Mode=ExtendSideEdges option. Then select the 3 edges that look like a “door” on the cylinder part. Boom. No crash dump or report dialog. 100% repeatable in both V6 and the current WIP.
In another file, this just caused me to loose a half-hour’s work… my fault of course, just got too involved to punch the “save” button. 🤦
I know that was the wrong option, but I was just trying something.
ReplaceEdge-InstantCrash.3dm (114.0 KB)