LaTeXStrings fractions as axis label yields AssertionError: length(positions) == length(colors)

[jewh]

Running latest version of CairoMakie - v0.5.10

As in title. MWE to reproduce the error:

using CairoMakie, LaTeXStrings

M = rand(10, 10)

fig = Figure()

ax = Axis(fig[1, 1])

heatmap!(ax, M)

ax.xlabel = L"\frac{\pi}{x}"

fig

Error message:

ERROR: AssertionError: length(positions) == length(colors)
Stacktrace:
  [1] draw_multi(primitive::LineSegments{Tuple{Vector{Point{2, Float32}}}}, ctx::Cairo.CairoContext, positions::Vector{Vec{2, Float32}}, colors::Vector{ColorTypes.RGBA{Float32}}, linewidths::Vector{Float32}, dash::Nothing)
    @ CairoMakie C:\Users\mert4417\.julia\packages\CairoMakie\tsPbW\src\primitives.jl:131
  [2] draw_atomic(scene::Scene, screen::CairoMakie.Screen{CairoMakie.IMAGE}, primitive::Union{Lines, LineSegments})
    @ CairoMakie C:\Users\mert4417\.julia\packages\CairoMakie\tsPbW\src\primitives.jl:58
  [3] draw_plot(scene::Scene, screen::CairoMakie.Screen{CairoMakie.IMAGE}, primitive::LineSegments{Tuple{Vector{Point{2, Float32}}}})
    @ CairoMakie C:\Users\mert4417\.julia\packages\CairoMakie\tsPbW\src\infrastructure.jl:106
  [4] draw_plot(scene::Scene, screen::CairoMakie.Screen{CairoMakie.IMAGE}, primitive::MakieCore.Text{Tuple{Vector{Point{2, Float32}}}})
    @ CairoMakie C:\Users\mert4417\.julia\packages\CairoMakie\tsPbW\src\infrastructure.jl:111
  [5] cairo_draw(screen::CairoMakie.Screen{CairoMakie.IMAGE}, scene::Scene)
    @ CairoMakie C:\Users\mert4417\.julia\packages\CairoMakie\tsPbW\src\infrastructure.jl:47
  [6] backend_show(screen::CairoMakie.Screen{CairoMakie.IMAGE}, io::Base64.Base64EncodePipe, #unused#::MIME{Symbol("image/png")}, scene::Scene)
    @ CairoMakie C:\Users\mert4417\.julia\packages\CairoMakie\tsPbW\src\display.jl:97
  [7] show(io::Base64.Base64EncodePipe, m::MIME{Symbol("image/png")}, figlike::Figure)
    @ Makie C:\Users\mert4417\.julia\packages\Makie\iY5BJ\src\display.jl:177
  [8] base64encode(::Function, ::MIME{Symbol("image/png")}, ::Vararg{Any}; context::Nothing)
    @ Base64 C:\Users\mert4417\AppData\Local\Programs\Julia-1.8.2\share\julia\stdlib\v1.8\Base64\src\encode.jl:209
  [9] _binstringmime
    @ C:\Users\mert4417\AppData\Local\Programs\Julia-1.8.2\share\julia\stdlib\v1.8\Base64\src\Base64.jl:46 [inlined]        
 [10] #stringmime#8
    @ C:\Users\mert4417\AppData\Local\Programs\Julia-1.8.2\share\julia\stdlib\v1.8\Base64\src\Base64.jl:43 [inlined]        
 [11] stringmime
    @ C:\Users\mert4417\AppData\Local\Programs\Julia-1.8.2\share\julia\stdlib\v1.8\Base64\src\Base64.jl:43 [inlined]        
 [12] display(d::VSCodeServer.InlineDisplay, m::MIME{Symbol("image/png")}, x::Figure)
    @ VSCodeServer c:\Users\mert4417\.vscode\extensions\julialang.language-julia-1.51.2\scripts\packages\VSCodeServer\src\display.jl:62
 [13] display(d::VSCodeServer.InlineDisplay, mime::String, x::Any)
    @ Base.Multimedia .\multimedia.jl:216
 [14] display(d::VSCodeServer.InlineDisplay, x::Figure)
    @ VSCodeServer c:\Users\mert4417\.vscode\extensions\julialang.language-julia-1.51.2\scripts\packages\VSCodeServer\src\display.jl:198
 [15] display(x::Any)
    @ Base.Multimedia .\multimedia.jl:328
 [16] display(figlike::Figure; backend::Module, screen_config::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
    @ Makie C:\Users\mert4417\.julia\packages\Makie\iY5BJ\src\display.jl:120
 [17] display(figlike::Figure)
    @ Makie C:\Users\mert4417\.julia\packages\Makie\iY5BJ\src\display.jl:109
 [18] #invokelatest#2
    @ .\essentials.jl:729 [inlined]
 [19] invokelatest
    @ .\essentials.jl:726 [inlined]
 [20] (::VSCodeServer.var"#67#72"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer c:\Users\mert4417\.vscode\extensions\julialang.language-julia-1.51.2\scripts\packages\VSCodeServer\src\eval.jl:227
 [21] withpath(f::VSCodeServer.var"#67#72"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams}, path::String)
    @ VSCodeServer c:\Users\mert4417\.vscode\extensions\julialang.language-julia-1.51.2\scripts\packages\VSCodeServer\src\repl.jl:274
 [22] (::VSCodeServer.var"#66#71"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer c:\Users\mert4417\.vscode\extensions\julialang.language-julia-1.51.2\scripts\packages\VSCodeServer\src\eval.jl:179
 [23] hideprompt(f::VSCodeServer.var"#66#71"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})
    @ VSCodeServer c:\Users\mert4417\.vscode\extensions\julialang.language-julia-1.51.2\scripts\packages\VSCodeServer\src\repl.jl:38
 [24] (::VSCodeServer.var"#65#70"{Bool, Bool, Bool, Module, String, Int64, Int64, String, VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer c:\Users\mert4417\.vscode\extensions\julialang.language-julia-1.51.2\scripts\packages\VSCodeServer\src\eval.jl:150
 [25] with_logstate(f::Function, logstate::Any)
    @ Base.CoreLogging .\logging.jl:511
 [26] with_logger
    @ .\logging.jl:623 [inlined]
 [27] (::VSCodeServer.var"#64#69"{VSCodeServer.ReplRunCodeRequestParams})()
    @ VSCodeServer c:\Users\mert4417\.vscode\extensions\julialang.language-julia-1.51.2\scripts\packages\VSCodeServer\src\eval.jl:253
 [28] #invokelatest#2
    @ .\essentials.jl:729 [inlined]
 [29] invokelatest(::Any)
    @ Base .\essentials.jl:726
 [30] macro expansion
    @ c:\Users\mert4417\.vscode\extensions\julialang.language-julia-1.51.2\scripts\packages\VSCodeServer\src\eval.jl:34 [inlined]
 [31] (::VSCodeServer.var"#62#63")()
    @ VSCodeServer .\task.jl:484

Seems to be specific to fractions. If one replaces the sixth line with `ax.xlabel=L"\pi x" everything behaves as expected.

[jewh]

System info:

julia> versioninfo()
Julia Version 1.8.2
Commit 36034abf26 (2022-09-29 15:21 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 16 × 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-13.0.1 (ORCJIT, tigerlake)
  Threads: 16 on 16 virtual cores
Environment:
  JULIA_EDITOR = code
  JULIA_NUM_THREADS = 16

[Kolaru]

The problem is the line, it fails with \sqrt as well.

Something goes wrong when the label is changed. If the xlabel is set at the axis creation, it works, e.g.

using CairoMakie

fig = Figure()
ax = Axis(fig[1, 1] ; xlabel = L"\frac{\pi}{x}")
fig

[jkrumbiegel]

Yes this seems to be a regression, the rotation of those lines also broke, there's another issue about that open already. Haven't had time to track it down, yet.

[jkrumbiegel]

I actually think this has to do with these lines https://github.com/MakieOrg/Makie.jl/blob/e4f363b1d081bc799a8a998ba7b4aad909a8c791/src/interfaces.jl#L85-L86 from this PR https://github.com/MakieOrg/Makie.jl/pull/3062 cc @SimonDanisch