Crash when converting objects from Curve to Mesh #66631
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Reference: blender/blender#66631
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System Information
Operating system: macOS and Manjaro Linux
Graphics card: Radeon M395 and GTX 1080
Blender Version
Broken: Latest buildbot build on macOS (July 9 2019) and master from a view days ago that I compiled on Linux.
Short description of error
Using a short script to convert a bunch of curves to meshes it turned out that just a few of them caused a crash.
It looks like
BKE_mesh_new_from_object
is returning NULL in the functionBKE_mesh_new_from_object_to_bmain
.Exact steps for others to reproduce the error
Convert Crash.blend
Run Script
. All the curve objects in the scene should already be selected.Backtrace
Added subscriber: @HooglyBoogly
The script contains some mistakes (you shouldn't iterate over the collection of "selected objects" and then change the selection state; that changes the very collection you're iterating over). However, the crash also happens when you simply select Convert to → Mesh from the menu.
The root cause was that Blender is unable to convert a single-vertex curve to a mesh, but didn't handle the resulting
NULL
pointer. This is a minimal example that just contains that curve: Convert_Crash.blendThis issue was referenced by
b39d7e484c
Changed status from 'Open' to: 'Resolved'
Oops! My bad! I was helping someone with that conversion the other day and I just quickly through together the script from the "Batch export" example.
Once again I'm super impressed by how fast you all deal with bugs, it's amazing! Thanks!