Here is a shorter sequence:

• New
• assemble oled13.slvs (probably works with anything)
• Sketch -> Anywhere in 3d
• Sketch -> In Workplane
• click away the complaint
• Sketch > ... and there it is again

Note that, if we leave out the assembly step, we just get "In Workplane", as expected.

@wpwrak, It seems I can't reproduce it on Windows. And it's strange how the following code can cause this:

    RadioMenuByCmd(Command::FREE_IN_3D, !locked);
    RadioMenuByCmd(Command::SEL_WORKPLANE, locked);

@Schroedinger, can you explain it?

Seems like UB...

UB = Ubuntu ? Yes, I'm on Ubuntu 16.10. I can collapse the quantum state (i.e., make it check only "Anywhere in 3d") by
https://0bin.net/paste/+c+6P42giR2hZiEl#AiwOfsiLHdPNCg2AOPR7Y3cM4g6xA2pY44gebEJmW7m
But I don't really know what I'm doing there, and if this may have nasty side-effects.

UB = Ubuntu ? Yes, I'm on Ubuntu 16.10

@wpwrak, What build of SolveSpace you use on Yakety now? Is it possible run it on Xenial?

@Symbian9: I just build from sources, with a number of fixes and improvement, either from @Evil-Spirit or self-made, that are not in mainline. Not sure about Xenial.

@wpwrak Are you still able to reproduce this? I've refactored a lot of the UI code in the meantime.

Have not been able to reproduce for two years, and no response in two months, closing.

I was able to reproduce it.

1. Draw a rectangle
2. Extrude it
3. Hit 2

OK, I figured it out. This is caused by rather obnoxious GTK behavior where set_active is not independent from causing a trigger event.

@phkahler I'm pretty sure this is not fixed--the underlying issue is the behavior of set_active in GTK which retriggers the action.

@phkahler I'm pretty sure this is not fixed--the underlying issue is the behavior of set_active in GTK which retriggers the action.

What do you mean? On the surface this seems to fix it. Are you saying the condition may reappear?

Are you saying the condition may reappear?

I don't know how to trigger it, but there is still a latent bug left in the GTK UI code, yes.