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Maniphest T72077

Mysterious duplicated vertices
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Description

System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 750 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.13

Blender Version
Broken: version: 2.82 (sub 1), branch: master, commit date: 2019-11-17 21:26, hash: rB6d9d24e3d459
Worked: (optional)

Short description of error
[Please fill out a short description of the error here]

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

Overall loving the updates of 2.82 but I've been experiencing this thing where verts come out of nowhere always over existing ones. As if I have been accidentally duplicating verticies as I pass them. I turned on the Info tab to see if maybe there is a new duplicate shortcut that I had been pressing. Instead I see this:

bpy.ops.mesh.remove_doubles()
Removed 0 vertice(s)
bpy.ops.mesh.edge_face_add()
bpy.ops.mesh.select_all(action='SELECT')
bpy.ops.object.editmode_toggle()
Selected meshes must have equal numbers of vertices
bpy.ops.object.editmode_toggle()
bpy.ops.mesh.remove_doubles()
Removed 26 vertice(s)

Here I had a mesh that has 2 shape keys which I meant to edit with X mirror on. But I realize I had it turned off so the plan was to add a mirror modifier duplicate them delete the other shape keys then join them back after applying mirror. Only to find that I couldn't join them because somewhere in the process it had gained verts. Here are all the operations in the way I saw them and I've attached a blend file which I tried to undo to the same point this starts.

gater2.blend11 MBDownload
The object I was editing in these steps was the one with the gap in it. Where I grabbed the left edge with the edge selector followed by the right then pressed f in the face_add() part. Just in case that is relevant.

Event Timeline

Luke Costello (lukostello) created this task.Dec 1 2019, 1:04 AM
Jacques Lucke (JacquesLucke) changed the task status from Needs Triage to Needs Information from User.Jan 8 2020, 12:02 PM
Jacques Lucke (JacquesLucke) added a subscriber: Jacques Lucke (JacquesLucke).

I have trouble reproducing the issue. Please provide more precise steps on how to reproduce it given you .blend file. Preferably, you could also simplify the .blend file a bit. Currently there seems to be a lot of stuff that is not necessary to get the issue.

Richard Antalik (ISS) closed this task as Archived.Jan 16 2020, 12:14 PM
Richard Antalik (ISS) claimed this task.
Richard Antalik (ISS) added a subscriber: Richard Antalik (ISS).

Since last asking for information it has been 7 or more days, due to the policy of our bug tracker we will have to close the report.

Luke Costello (lukostello) added a comment.Jun 16 2020, 6:37 AM

I found the source of the issue. I had the spin tool selected on the menu that pops up when you press T in edit mode. The spin tool's angle was set to 0 and I didn't know that clicking and dragging used whichever tool was selected at the time so I was creating spin effects every time I clicked and dragged. If anyone else is experiencing this issue that is why.