fatal assertion failure in igl::circulation

[jwwalker]

When I try to decimate this file to 63% or less, I get a fatal assertion failure in igl::circulation:

Assertion failed: ((EF(e,1) == ff || EF(e,0) == ff) && "e should touch ff"), function operator(), file circulation.cpp, line 30.

forest.obj.zip

I'm working on macOS 11.5 using Xcode 12.5.1.

[FishWoWater]

@jwwalker Hi, did you solve this problem? I think the error may occur on non-manifold meshes. At first glance, L97-L156 in decimate.cpp do not update the EI and EMAP, which is used in igl circulation.cpp