Suppressing automatic display(::Makie.Scene) in the REPL

Specific Domains Visualization
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1

A common occurrence when I’m working on Makie stuff at the REPL:

julia> foo = some_function_that_returns_a_scene()
Error showing value of type Makie.Scene:
ERROR: AssertionError: internal error. Scene already displayed by screen but not as root scene

This happens to be with GLMakie and in the VS Code REPL but I think something similar can happen with other backends and just at a plain terminal.

Is there some way to turn off this behavior? What I really want here is for the REPL to just print out a description of the Scene, i.e. something like:

julia> println(repr(foo))
Scene (1000px, 1000px):
  1 Plot:
    └ MakieCore.Combined{Makie.tooltip, Tuple{GeometryBasics.Point{2, Float32}}}
  0 Child Scenes
2

Do you have a complete example that triggers this error for you? Just to understand what you’re doing, irrespective of the error message and what could be done about that.

3

To remove the error, at least, have you tried ; at the end of the statement, like

julia> foo = some_function_that_returns_a_scene();

?

4

Sure, just something as simple as e.g.

using Makie
using GLMakie
f = Figure() # opens a window, OK
s = Scene(f.scene) # throws the AssertionError

Yes, a trailing semicolon of course suppresses this but it’s easy to forget and in general I never want to implicitly display, but I often want to see the repr while doing exploratory work.