Crash after selecting cluster

[hamnis]

Issue description

select a cluster with limited access rights. This uses the latest flatpak version.

crash:

panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: closure error: unexpected panic caught: runtime error: invalid memory address or nil pointer dereference

Closure added at:
	github.com/diamondburned/gotk4/pkg/glib/v2.IdleAdd at github.com/diamondburned/gotk4/[email protected]/glib/v2/glib.go:33679
	github.com/getseabird/seabird/internal/ui.(*WelcomeWindow).createContent.func3.1 at github.com/getseabird/seabird/internal/ui/welcome_window.go:132
	runtime.goexit at runtime/asm_amd64.s:1695
[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x2797efa]

goroutine 1 [running, locked to thread]:
github.com/diamondburned/gotk4/pkg/core/closure.(*FuncStack).Panicf(0xc0007d4fc0, {0x309be3b, 0x1b}, {0xc000725258, 0x1, 0x1})
	github.com/diamondburned/gotk4/[email protected]/core/closure/funcstack.go:104 +0x908
github.com/diamondburned/gotk4/pkg/core/closure.(*FuncStack).TryRepanic(0xc0007d4fc0)
	github.com/diamondburned/gotk4/[email protected]/core/closure/funcstack.go:122 +0xc5
panic({0x2b9aae0?, 0x56e46a0?})
	runtime/panic.go:770 +0x132
github.com/getseabird/seabird/internal/ui/list.(*List).createColumns(0xc00079f800)
	github.com/getseabird/seabird/internal/ui/list/list.go:141 +0x7a
github.com/getseabird/seabird/internal/ui/list.(*List).onObjectsChange(0xc00079f800, {0x0, 0x0, 0x5626eb?})
	github.com/getseabird/seabird/internal/ui/list/list.go:112 +0x2f2
github.com/getseabird/seabird/internal/ui/common.OnChange[...]({0x34810d0, 0xc00020e360}, {0x3472ca8, 0xc0002a01c0}, 0xc000a01480)
	github.com/getseabird/seabird/internal/ui/common/on.go:27 +0x12a
github.com/getseabird/seabird/internal/ui/list.NewList({0x34810d0, 0xc00020e360}, 0xc0004db290, 0xc00020e8d0, 0xc0006fe000)
	github.com/getseabird/seabird/internal/ui/list/list.go:72 +0x478
github.com/getseabird/seabird/internal/ui.NewClusterWindow({0x34810d0, 0xc000124030}, 0xc0006d0c90, 0xc0004db290)
	github.com/getseabird/seabird/internal/ui/cluster_window.go:112 +0x874
github.com/getseabird/seabird/internal/ui.(*WelcomeWindow).createContent.func3.1.1()
	github.com/getseabird/seabird/internal/ui/welcome_window.go:140 +0xb8
github.com/diamondburned/gotk4/pkg/core/glib._gotk4_sourceFunc(0x1007)
	github.com/diamondburned/gotk4/[email protected]/core/glib/glib.go:352 +0xd9
github.com/diamondburned/gotk4/pkg/gio/v2._Cfunc_g_application_run(0x18652f30, 0x1, 0x186bd490)
	_cgo_gotypes.go:12555 +0x4b
github.com/diamondburned/gotk4/pkg/gio/v2.(*Application).Run.func3(0x18652f30, 0x1, 0x186bd490)
	github.com/diamondburned/gotk4/[email protected]/gio/v2/gio.go:36988 +0x67
github.com/diamondburned/gotk4/pkg/gio/v2.(*Application).Run(0xc0006120a8, {0xc000052090, 0x1, 0x1})
	github.com/diamondburned/gotk4/[email protected]/gio/v2/gio.go:36988 +0x1f1
github.com/getseabird/seabird/internal/ui.(*Application).Run(0x3079ffb?)
	github.com/getseabird/seabird/internal/ui/application.go:70 +0x2d
main.main()
	github.com/getseabird/seabird/main.go:31 +0xc5

expected result: not crash

Steps to reproduce

Select a cluster with limited access rights

System information

flatpak dev.skynomads.Seabird v0.5.1, Pop! OS, linux kernel: 6.9.3-76060903-generic

[cyberfrogg]

Not happening on version 0.4.2, commit cb6f99a4ac1b32a4c7d88f86b7da3ccd65d490f9126aa64010b993389c00b751.

Temporary using old flatpak version. Downgrade:

sudo flatpak update --commit=cb6f99a4ac1b32a4c7d88f86b7da3ccd65d490f9126aa64010b993389c00b751 dev.skynomads.Seabird