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Edge slide with X-mirror and Topology mirror crashes
Open, Needs Information from UserPublic


System Information
Operating system: Windows 10
Graphics card: GeForce GTX 980

Blender Version
Broken: 2.80, bb7b741d2f1c, Beta, 2019-07-10, as found on splash screen

Short description of error
Using edge slide at the center line of the model while the X-Mirror and Topology Mirror options are turned on is causing crashes.

Exact steps for others to reproduce the error
Using a symmetrical model with only a multires modifier, have X-Mirror and Topology mirror turned on. In edit mode, grab a few edges starting from the center of the model and use edge slide. This should cause a crash.



Event Timeline

I cannot reproduce the crash in 676543d91f5c However "Topology/Mirror" doesn't seem to work?

Philipp Oeser (lichtwerk) triaged this task as Needs Information from User priority.

Also cannot get it to crash.
@Edgar (soupertrooper): mind sharing a .blend with the right stuff selected, so we can reproduce?

@Marcin Twarowski (Tvaroog) : please only one issue per report, if there is something wrong with Topology mirror, please open a new report for this

if there is something wrong with Topology mirror, please open a new report for this

2.79 manual says:

The Topology Mirror functionality will work more reliably on mesh geometry which is more detailed. If you use very simple geometry, for example a Cube or UV Sphere, the Topology Mirror option will often not work.

So I guess it's not a bug.

Would it be alright if I shared a video of the bug? I would prefer not to share the model.

Here is the video

Ok. Mirror topology doesn't work with simple meshes. So I tried it with Suzanne with multires and indeed it crashes. Just try edge slide on a selected edge:

Tested with release candidate.