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Crash When Removing Multi-Res Modifier from Sculpt Object
Closed, ResolvedPublic


System Information
Operating system: Win 10 64
Graphics card: GTX 1070

Blender Version
Broken: 2.80 - 2018-11-30 00.46

Short description of error
Blender crashes out when removing/deleting the Multi-Res modifier from an object while in sculpt mode.

Exact steps for others to reproduce the error
-Open default file.
-Go to Sculpting Workspace.
-Add Multi-Res modifier to default cube.
-Subdivide at least once using the modifier
-Sculpt on the object at least once with any sculpting tool.
-Delete the Multi-Res modifier (hit X on the modifier)

Blender crashes.

Event Timeline

Philipp Oeser (lichtwerk) triaged this task as Confirmed, Medium priority.Nov 30 2018, 3:22 PM

Can confirm.

MDisps *mdisps = CustomData_get_layer(&coarse_mesh->ldata, CD_MDISPS);
mdisps is NULL

1  multiresModifier_reshapeFromCCG 			multires_reshape.c 1176 0x2b0b86f      
2  object_update_from_subsurf_ccg			object.c           391  0x2b22bde      
3  BKE_object_free_derived_caches			object.c           459  0x2b22d7d      
4  mesh_build_data					DerivedMesh.c      2007 0x29a526e      
5  makeDerivedMesh					DerivedMesh.c      2120 0x29a55e1      
6  BKE_object_handle_data_update			object_update.c    205  0x2b3621f      
7  BKE_object_eval_uber_data				object_update.c    348  0x2b36922

@Sergey Sharybin (sergey): mind checking on this one?

This comment was removed by Sergey (koloved).