Observer error when kill

Hi, I’m learning Elixir.

I’m on Mac OS. I’m playing around with observer and trying to visualize how supervisors handle killed processes they supervise. When I launch iex and run :observer.start() and look at the application tree, if I right click on a supervised process and select Kill process with reason kill, iex crashes and I get the mac error:

Assertion failed: (s->stack->next != NULL), function CGGStackRestore, file /BuildRoot/Library/Caches/com.apple.xbs/Sources/CoreGraphics/CoreGraphics-1245.8.4.8/CoreGraphics/Context/CGGStack.c, line 77.

Has anyone also seen this on their mac? I could not find any answer on this online for erlang. My windows machine works fine and the supervisor does what it has to do.

It looks like this issue.

Thank you, that is the issue. I will follow there.