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Knife Project fails to cut circles into a mesh
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System Information
Win 8.1 PRO i7 3770K R9 290X
MacBook pro Retina 2013 i7 4770 GTX 630

Blender Version
Broken: All the versions after ( and included ) 2.73 RC d7e4944
Working: All the versions before 2.73 RC

Short description of error

Knife Project does not work, in some simple cases produce an incorrect result

Exact steps for others to reproduce the error

New Project => Add plane => Add Circle => Select first the circle then the plane => Enter edit mode => Knife Project

Event Timeline

Francesco Bruno (Thanzex) claimed this task.
Francesco Bruno (Thanzex) removed Francesco Bruno (Thanzex) as the assignee of this task.
Francesco Bruno (Thanzex) raised the priority of this task from to 90.
Francesco Bruno (Thanzex) updated the task description. (Show Details)
Francesco Bruno (Thanzex) edited a custom field.
Julian Eisel (Severin) lowered the priority of this task from 90 to 30.Jan 12 2015, 9:01 PM

Cannot confirm that here. Can you attach a screenshot and a .blend showing the issue?

@Campbell Barton (campbellbarton), Is that something you heard of before?

Here you go:

2.72 Behavior: (correct)

2.73 Behavior:

Following exactly the steps i mentioned above

Julian Eisel (Severin) raised the priority of this task from 30 to 50.Jan 12 2015, 10:04 PM

Mhh indeed, checked again with latest master and it happens

Campbell Barton (campbellbarton) renamed this task from Knife Project not working to Knife Project fails to cut circles into a mesh.Jan 13 2015, 7:05 AM

This is caused by fix for T42864, looking into a fix which can support both.