Crash when opening direct message from bot.

[ScanuNicco]

I am the developer of a custom Discord bot that will send DMs containing buttons to people who use it. When I try to open the dm from the development version that bot, gtkcord4 crashes. Interestingly, the dm channel from the production version of the bot does not cause gtkcord4 to crash. I am on Fedora 38 with KDE, and gtkcord4 is installed as a Flatpak.

2023/09/11 16:58:55 failed to read user.css: open /home/nscanu/.var/app/xyz.diamondb.gtkcord4/config/gtkcord4/user.css: no such file or directory
2023/09/11 16:58:55 State: WidgetHandler: binding to *window.loginWindow...
2023/09/11 16:58:56 connected: READY
2023/09/11 16:58:56 icon: unknown icon "forum-dark.png"
2023/09/11 16:58:56 Warning: Adwaita: Using GtkSettings:gtk-application-prefer-dark-theme with libadwaita is unsupported. Please use AdwStyleManager:color-scheme instead.
2023/09/11 16:59:00 loading message view for 1055353746823073842
2023/09/11 16:59:00 State: WidgetHandler: binding to *message.View...
2023/09/11 16:59:00 Discord API: GET /api/v9/channels/1055353746823073842/messages
2023/09/11 16:59:00 State: WidgetHandler: binding to *composer.View...
2023/09/11 16:59:00 message.View.MarkRead: marked 1150515063984230461 as read, last read 1150515063984230461
2023/09/11 16:59:00 message.View.MarkRead: marked 1150515063984230461 as read, last read 1150515063984230461
2023/09/11 16:59:00 message.View.MarkRead: marked 1150515063984230461 as read, last read 1150515063984230461
2023/09/11 16:59:00 message.View.MarkRead: marked 1150515063984230461 as read, last read 1150515063984230461
2023/09/11 16:59:01 message.View.MarkRead: marked 1150515063984230461 as read, last read 1150515063984230461
2023/09/11 16:59:01 message.View.MarkRead: marked 1150515063984230461 as read, last read 1150515063984230461
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.TimeoutAdd at /run/build/gtkcord4/vendor/github.com/diamondburned/gotk4/pkg/glib/v2/glib.go:30358
        github.com/diamondburned/gtkcord4/internal/message.(*View).load.func1.3 at /run/build/gtkcord4/internal/message/view.go:367
        github.com/diamondburned/gotkit/gtkutil.Async.func1.1 at /run/build/gtkcord4/vendor/github.com/diamondburned/gotkit/gtkutil/gtkutil.go:334
[signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x166d749]

goroutine 1 [running, locked to thread]:
github.com/diamondburned/gotk4/pkg/core/closure.(*FuncStack).Panicf(0xc0002c25a0, {0x23e7dd3, 0x1b}, {0xc00055ed30, 0x1, 0x1})
        /run/build/gtkcord4/vendor/github.com/diamondburned/gotk4/pkg/core/closure/funcstack.go:104 +0x928
github.com/diamondburned/gotk4/pkg/core/closure.(*FuncStack).TryRepanic(0xc000b1aa20?)
        /run/build/gtkcord4/vendor/github.com/diamondburned/gotk4/pkg/core/closure/funcstack.go:122 +0xc5
panic({0x203b060?, 0x4271f30?})
        /usr/lib/sdk/golang/src/runtime/panic.go:914 +0x21f
github.com/yuin/goldmark/ast.(*CodeSpan).Parent(0x27?)
        <autogenerated>:1 +0x9
github.com/yuin/goldmark/ast.ensureIsolated({0x26e2430, 0x0})
        /run/build/gtkcord4/vendor/github.com/yuin/goldmark/ast/ast.go:184 +0x24
github.com/yuin/goldmark/ast.(*BaseNode).AppendChild(0xc000af0d80, {0x26e16b0, 0xc000af0d80}, {0x26e2430, 0x0})
        /run/build/gtkcord4/vendor/github.com/yuin/goldmark/ast/ast.go:311 +0x36
github.com/yuin/goldmark/parser.(*parser).parseBlock(0xc000b16a00, {0x26dd638?, 0xc000e12d20}, {0x26e16b0, 0xc000af0d80}, {0x26dd940, 0xc0003b3880})
        /run/build/gtkcord4/vendor/github.com/yuin/goldmark/parser/parser.go:1192 +0x2c7
github.com/yuin/goldmark/parser.(*parser).Parse.func2({0x26e16b0?, 0xc000af0d80?})
        /run/build/gtkcord4/vendor/github.com/yuin/goldmark/parser/parser.go:864 +0x3d
github.com/yuin/goldmark/parser.(*parser).walkBlock(0x2136b00?, {0x26e16b0, 0xc000af0d80}, 0xc00055f220)
        /run/build/gtkcord4/vendor/github.com/yuin/goldmark/parser/parser.go:1115 +0x79
github.com/yuin/goldmark/parser.(*parser).walkBlock(0xc0007ffa70?, {0x26e1470, 0xc000b1a870}, 0xc00055f220)
        /run/build/gtkcord4/vendor/github.com/yuin/goldmark/parser/parser.go:1113 +0x4c
github.com/yuin/goldmark/parser.(*parser).Parse(0xc000b16a00, {0x26dd418, 0xc0003b39d0}, {0xc00078f478, 0x1, 0x7f6f26b94368?})
        /run/build/gtkcord4/vendor/github.com/yuin/goldmark/parser/parser.go:863 +0x1f3
github.com/diamondburned/ningen/v3/discordmd.ParseWithMessage({0xc0007ffa70, 0x2a, 0x30}, {{0x26c8898, 0xc0001c8000}, {0x26d2f70, 0xc00019a960}, {0x26c9400, 0xc0000137d0}, {0x26c9f60, ...}, ...}, ...)
        /run/build/gtkcord4/vendor/github.com/diamondburned/ningen/v3/discordmd/md.go:39 +0x47c
github.com/diamondburned/gtkcord4/internal/message.(*Content).Update(0xc000fbc0c0, 0xc000b1c480, {0x0, 0x0, 0xc000b1c480?})
        /run/build/gtkcord4/internal/message/content.go:278 +0x13a5
github.com/diamondburned/gtkcord4/internal/message.(*message).update(0xc00108af10, {0x26d9a80, 0xc00108af00}, 0xc000b1c480)
        /run/build/gtkcord4/internal/message/message.go:85 +0x6d
github.com/diamondburned/gtkcord4/internal/message.(*collapsedMessage).Update(0xc00108af00, 0xc000b1c480)
        /run/build/gtkcord4/internal/message/message.go:334 +0x39
github.com/diamondburned/gtkcord4/internal/message.(*View).load.func1.3.1(0x20c27c0?)
        /run/build/gtkcord4/internal/message/view.go:341 +0xfa
github.com/diamondburned/gtkcord4/internal/message.(*View).load.func1.3.2()
        /run/build/gtkcord4/internal/message/view.go:369 +0x32
github.com/diamondburned/gotk4/pkg/core/glib._gotk4_sourceFunc(0x14da)
        /run/build/gtkcord4/vendor/github.com/diamondburned/gotk4/pkg/core/glib/glib.go:340 +0xd9
github.com/diamondburned/gotk4/pkg/gio/v2._Cfunc_g_application_run(0x60ad190, 0x1, 0x60b2820)
        _cgo_gotypes.go:13789 +0x4b
github.com/diamondburned/gotk4/pkg/gio/v2.(*Application).Run.func3(0xc0004a6100?, 0x8?, 0x60b2820?)
        /run/build/gtkcord4/vendor/github.com/diamondburned/gotk4/pkg/gio/v2/gio.go:41611 +0x67
github.com/diamondburned/gotk4/pkg/gio/v2.(*Application).Run(0xc000139f38, {0xc0000360f0?, 0x1, 0x1})
        /run/build/gtkcord4/vendor/github.com/diamondburned/gotk4/pkg/gio/v2/gio.go:41611 +0x20b
github.com/diamondburned/gotkit/app.(*Application).Run(0xc000142480, {0xc0000360f0, 0x1, 0x1})
        /run/build/gtkcord4/vendor/github.com/diamondburned/gotkit/app/app.go:272 +0x14f
github.com/diamondburned/gotkit/app.(*Application).RunMain(0x26cc320?)
        /run/build/gtkcord4/vendor/github.com/diamondburned/gotkit/app/app.go:277 +0x28
main.main()
        /run/build/gtkcord4/main.go:60 +0x5d8

If it helps, here is the function from my bot responsible for sending the buttons:

    async sendControls(client) {
        const userObj = await client.users.fetch(this.target.id);
        const userDM = await userObj.createDM();
        const row = new ActionRowBuilder()
            .addComponents(
                new ButtonBuilder()
                    .setCustomId('foundRide')
                    .setLabel('I Found a Ride!')
                    .setStyle(ButtonStyle.Primary),
                new ButtonBuilder()
                    .setCustomId('cancelReq')
                    .setLabel('Cancel this Request')
                    .setStyle(ButtonStyle.Danger),
            );
        const controls = await userDM.send({content: "**Handy Control Panel:** Ride request for `" + this.destName + "`", components: [row]});
        return controls.id;
    }

[diamondburned]

Agh, more Markdown parser bugs! I've been trying to figure out that part, but I must've made some really funny mistake.

Could you try sending me what the full message in raw Markdown was?

[ScanuNicco]

The message contains the following text

**Handy Control Panel:** Ride request for `Vigo Bowl`

Along with two clickable buttons, which I suspect are the source of the crash. I'm not sure if it's possible to copy the source for those.

[diamondburned]

Can you check this again with the latest nightly build?