Colorbar fails with getindex on a poly but not a mesh

[BambOoxX]

While testing the examples for mesh I stumbled upon a weird error when replacing mesh with poly.

In fact, evaluating this example works fine

using FileIO
using GLMakie

brain = load(assetpath("brain.stl"))

f, ax, m = mesh(
    brain,
    color = [tri[1][2] for tri in brain for i in 1:3],
    colormap = Reverse(:Spectral),
    figure = (resolution = (1000, 1000),)
)

Colorbar(f[1,2],m)

and expectedly returns the brain image with a colorbar on its right

However, just replacing the mesh with a poly fails with

ERROR: MethodError: no method matching getindex(::MakieCore.Automatic, ::Int64)
Stacktrace:
  [1] scaled_steps(steps::Vector{Float64}, scale::Function, lims::MakieCore.Automatic)
    @ Makie.MakieLayout D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables\colorbar.jl:383
  [2] (::Makie.MakieLayout.var"#477#507")(bbox::GeometryBasics.HyperRectangle{2, Float32}, v::Bool, steps::Vector{Float64}, gradient::PlotUtils.ContinuousColorGradient, scale::Function, lims::MakieCore.Automatic)
    @ Makie.MakieLayout D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables\colorbar.jl:174
  [3] lift(::Function, ::Observable{GeometryBasics.HyperRectangle{2, Float32}}, ::Observable{Any}, ::Vararg{Any}; kw::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
    @ Makie D:\bambooxx\.julia\packages\Makie\f11Ut\src\interaction\observables.jl:30
  [4] lift(::Function, ::Observable{GeometryBasics.HyperRectangle{2, Float32}}, ::Observable{Any}, ::Observable{Vector{Float64}}, ::Vararg{Any})
    @ Makie D:\bambooxx\.julia\packages\Makie\f11Ut\src\interaction\observables.jl:27
  [5] layoutable(::Type{Colorbar}, fig_or_scene::Figure; bbox::Nothing, kwargs::Base.Pairs{Symbol, Observable{Any}, Tuple{Symbol, Symbol}, NamedTuple{(:colormap, :limits), Tuple{Observable{Any}, Observable{Any}}}})
    @ Makie.MakieLayout D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables\colorbar.jl:169
  [6] layoutable(::Type{Colorbar}, fig_or_scene::Figure, plot::Combined{Makie.poly, Tuple{GeometryBasics.Mesh{3, Float32, GeometryBasics.TriangleP{3, Float32, GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}}, GeometryBasics.FaceView{GeometryBasics.TriangleP{3, Float32, GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}}, GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}, GeometryBasics.NgonFace{3, GeometryBasics.OffsetInteger{-1, UInt32}}, StructArrays.StructVector{GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}, NamedTuple{(:position, :normals), Tuple{Vector{Point{3, Float32}}, Vector{Vec{3, Float32}}}}, Int64}, Vector{GeometryBasics.NgonFace{3, GeometryBasics.OffsetInteger{-1, UInt32}}}}}}}; kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
    @ Makie.MakieLayout D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables\colorbar.jl:9
  [7] layoutable
    @ D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables\colorbar.jl:3 [inlined]
  [8] #_layoutable#11
    @ D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables.jl:69 [inlined]
  [9] _layoutable
    @ D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables.jl:69 [inlined]
 [10] _layoutable(T::Type{Colorbar}, gp::GridPosition, args::Combined{Makie.poly, Tuple{GeometryBasics.Mesh{3, Float32, GeometryBasics.TriangleP{3, Float32, GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}}, GeometryBasics.FaceView{GeometryBasics.TriangleP{3, Float32, GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}}, GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}, GeometryBasics.NgonFace{3, GeometryBasics.OffsetInteger{-1, UInt32}}, StructArrays.StructVector{GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}, NamedTuple{(:position, :normals), Tuple{Vector{Point{3, Float32}}, Vector{Vec{3, Float32}}}}, Int64}, Vector{GeometryBasics.NgonFace{3, GeometryBasics.OffsetInteger{-1, UInt32}}}}}}}; kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
    @ Makie.MakieLayout D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables.jl:64
 [11] _layoutable(T::Type{Colorbar}, gp::GridPosition, args::Combined{Makie.poly, Tuple{GeometryBasics.Mesh{3, Float32, GeometryBasics.TriangleP{3, Float32, GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}}, GeometryBasics.FaceView{GeometryBasics.TriangleP{3, Float32, GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}}, GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}, GeometryBasics.NgonFace{3, GeometryBasics.OffsetInteger{-1, UInt32}}, StructArrays.StructVector{GeometryBasics.PointMeta{3, Float32, Point{3, Float32}, (:normals,), Tuple{Vec{3, Float32}}}, NamedTuple{(:position, :normals), Tuple{Vector{Point{3, Float32}}, Vector{Vec{3, Float32}}}}, Int64}, Vector{GeometryBasics.NgonFace{3, GeometryBasics.OffsetInteger{-1, UInt32}}}}}}})
    @ Makie.MakieLayout D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables.jl:60
 [12] Colorbar(::GridPosition, ::Vararg{Any}; kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
    @ Makie.MakieLayout D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables.jl:49
 [13] Colorbar(::GridPosition, ::Vararg{Any})
    @ Makie.MakieLayout D:\bambooxx\.julia\packages\Makie\f11Ut\src\makielayout\layoutables.jl:49
 [14] top-level scope
    @ REPL[30]:1

Apparently doing the same thing with wireframe fails in the same fashion.
This is particularly surprising to me since a mesh seems to be the combination of a poly and a wireframe...

I'm running on

Julia Version 1.7.1
Commit ac5cc99908 (2021-12-22 19:35 UTC)
Platform Info:
OS: Windows (x86_64-w64-mingw32)
CPU: 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-12.0.1 (ORCJIT, tigerlake)

with GLMakie v0.5.1

[BambOoxX]

Additional information:

• The problem stiil show up with latest GLMakie version : v0.6.8
• If a colorrange argument is passed, the error does no show up, making it linked with the MakieCore.Automatic not being handled at some point.

[ffreyer]

This was fixed