Post your proposal over here: https://blender.community/c/rightclickselect/

Okay, I see. It is just illogical unintuitive and hidden behaviour.

This is not a bug. This is how the modifier works.
The bend operation will not move the plane in the object origin resides in.

This looks like expected behavior for me [2.79 was doing exactly the same].

Thank you for your effort. It works now.

I've elaborated a bit more on this issue in a devtalk post, as not to clutter the bug tracker too much.
Here's the full post for anyone interested: https://devtalk.blender.org/t/opensubdiv-issues-with-large-and-complex-meshes/5534

I confirm this and will fix it. Thanks for the report.

Defined RNA property default.

Think it's fine.
The RNA should indeed be changed though.

Seems to make sense to me, @William Reynish (billreynish) @Sergey Sharybin (sergey) @Brecht Van Lommel (brecht) @Campbell Barton (campbellbarton) any of you guys against that change (switching default boolean modifier op to Difference).

Oh okay sorry then this was a mistake on my side, thanks for the help.

Can confirm.
Getting an assert in Eigen:

In T61391#618100, @Bastien Montagne (mont29) wrote:

we do have valid final and deformed (aka cage) evaluated meshes in BMEditMesh, nowadays. So fix is actually quite simple. ;)

doh! thats a facepalm on my side... thx @Bastien Montagne (mont29)

The first one you linked is missing the opensubdiv toggles in the pkgbuild. So that is probably why.

I usesd this AuR Package to compile it. https://aur.archlinux.org/packages/blender-git/ I didn't disable or enable opensubdiv support. However I can try to install blender from this source: https://aur.archlinux.org/packages/blender-2.8-git/

BKE_modifier_get_evaluated_mesh_from_evaluated_object() is doing plain rubbish in EditMode case… That was probably true at the time it was written, but we do have valid final and deformed (aka cage) evaluated meshes in BMEditMesh, nowadays. So fix is actually quite simple. ;)

Is you blender version compiled with opensubdiv support?

This was indeed working fine in 2.79.
In 2.8 it updates fine if you go back to objectmode.
Once you enter editmode on the plane, I am getting this here:
ERROR (bke.modifier): /blender/source/blender/blenkernel/intern/modifier.c:385 modifier_setError: Cage verts changed from 162 to 81
So looks like BKE_modifier_get_evaluated_mesh_from_evaluated_object doesnt really give us fully evaluated mesh (at least not for objects with generative modifiers in editmode)?

ok - thank you for explanation

We do not handle user support on this tracker, only bug reports. User forums like blenderartists.org or blender.stackexchange.com should be used for that matter.

should i apply something to the object?

reopened T60552, but this is still a duplicate...

See T60552

Might be new dependency graph, might be fix in some other area. If the issue is fixed in blender2.8, i'd consider this resolved :)

OK, just tried it and it works. New dependency graph?

@Steffen Dünner (SteffenD) can you try 2.8 also?

In T53341#614867, @Sergey Sharybin (sergey) wrote:

@Steffen Dünner (SteffenD), do you mind testing latest build from builder.blender.org?

@Steffen Dünner (SteffenD), do you mind testing latest build from builder.blender.org?

@Sergey Sharybin (sergey) it seem like it can not longer reproduce the issue on my end with either blender 2.8 or blender 2.79 :S

@Sebastian Parborg (zeddb), i can not reproduce the issue here, but i can currently only render on CPU. Does it happen when file is re-saved with CPU settings for you?

This seems to still be a problem with the latest blender 2.8 beta.