Doesn't work on Julia 1.6

[PallHaraldsson]

I submit here (first), as it may be a bug in this package (or dependencies) and/or Julia? Would you rather want it submitted at Julia (only)? For now only here.

With a minimally changed pidigits (from the Benchmark game), to run from the REPL, I get an error profiling it. I doubt it's about the program itself or julia options, as similar works in julia 1.5:

$ ~/julia-1.6.0-DEV-8f512f3f6d/bin/julia -O3 --cpu-target=core2 -p4

julia> @profview (GC.enable(false); pidigits(10000);GC.enable(true););
3141592653      :10
[..]
5525637567	:10000
ERROR: could not load symbol "jl_function_ptr":
/home/pharaldsson_sym/julia-1.6.0-DEV-8f512f3f6d/bin/../lib/libjulia.so.1: undefined symbol: jl_function_ptr
Stacktrace:
 [1] cfunction_(::Any, ::Any, ::Any) at /home/pharaldsson_sym/.julia/packages/Gtk/X3A4U/src/GLib/GLib.jl:35
 [2] cfunction_ at /home/pharaldsson_sym/.julia/packages/Gtk/X3A4U/src/GLib/GLib.jl:32 [inlined]
 [3] signal_connect_generic(::Function, ::Gtk.GtkCanvas, ::String, ::Type{Nothing}, ::Tuple{}, ::Bool, ::Gtk.GtkCanvas) at /home/pharaldsson_sym/.julia/packages/Gtk/X3A4U/src/GLib/signals.jl:11
 [4] signal_connect at /home/pharaldsson_sym/.julia/packages/Gtk/X3A4U/src/GLib/signals.jl:6 [inlined] (repeats 2 times)
 [5] Gtk.GtkCanvas(::Int64, ::Int64) at /home/pharaldsson_sym/.julia/packages/Gtk/X3A4U/src/cairo.jl:20
 [6] GtkReactive.Canvas{GtkReactive.UserUnit}(::Int64, ::Int64; own::Bool) at /home/pharaldsson_sym/.julia/packages/GtkReactive/lAPT0/src/graphics_interaction.jl:235
 [7] Canvas at /home/pharaldsson_sym/.julia/packages/GtkReactive/lAPT0/src/graphics_interaction.jl:235 [inlined]
 [8] canvas at /home/pharaldsson_sym/.julia/packages/GtkReactive/lAPT0/src/graphics_interaction.jl:259 [inlined] (repeats 2 times)
 [9] view(::FlameGraphs.FlameColors, ::LeftChildRightSiblingTrees.Node{FlameGraphs.NodeData}; data::Array{UInt64,1}, lidict::Dict{UInt64,Array{Base.StackTraces.StackFrame,1}}, kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at /home/pharaldsson_sym/.julia/packages/ProfileView/1t7it/src/ProfileView.jl:86
 [10] #view#2 at /home/pharaldsson_sym/.julia/packages/ProfileView/1t7it/src/ProfileView.jl:66 [inlined]
 [11] #view#5 at /home/pharaldsson_sym/.julia/packages/ProfileView/1t7it/src/ProfileView.jl:77 [inlined]
 [12] view() at /home/pharaldsson_sym/.julia/packages/ProfileView/1t7it/src/ProfileView.jl:76
 [13] top-level scope at /home/pharaldsson_sym/.julia/packages/ProfileView/1t7it/src/ProfileView.jl:32

[KristofferC]

Dup of JuliaGraphics/Gtk.jl#511.