Client icon artifacts in taskbar after client exits when using custom widget template with awful.widget.tasklist.

[djsigmann]

Output of awesome --version:
awesome v4.3-1588-gb54e50ad6 (Too long)
• Compiled against Lua 5.4.4 (running with 0.9.2)
• API level: 4
• D-Bus support: yes
• xcb-errors support: yes
• execinfo support: yes
• xcb-randr version: 1.6
• LGI version: /usr/share/lua/5.4/lgi/version.lua
• Transparency enabled: yes
• Custom search paths: no

How to reproduce the issue:

awful.widget.tasklist { -- Create a tasklist widget
	screen = s,
	filter = awful.widget.tasklist.filter.currenttags,
	buttons = require("binds.tasklist").mouse,
	layout = {
		layout  = wibox.layout.fixed.horizontal,
		spacing = 8,
		spacing_widget = {
			color  = "transparent",
			widget = wibox.widget.separator,
		},
	},
	style = {
		disable_task_name = true,
	},
	widget_template = {
		layout = wibox.layout.fixed.vertical,
		---[[
		{
			widget = wibox.container.background,
			id = "background_role",
			forced_height = 4,
			shape = gears.shape.rounded_bar,
		},
		--]]
		{
			layout = wibox.layout.stack,
			--[[
			{
				id = "icon_role",
				widget = wibox.widget.imagebox,
			},
			--[==[]]
			awful.widget.clienticon,
			--]==]
			{
				widget = wibox.container.place,
				valign = "bottom",
				halign = "left",
				{
					id		= "text_role",
					widget	= wibox.widget.textbox,
				},
			},
		},
		end,
	},
}

Actual result:

output.mp4

Expected result:

Those small artifacts that are essentially the cropped edges of the client's icon should not be there after the client exits.

Using a compositor has no effect on this behaviour.

[actionless]

Transparency enabled: yes

try running awesome with --no-argb flag or with compositor

[djsigmann]

try running awesome with --no-argb flag or with compositor

Had no effect, other than (obviously) there not being any transparency with or without a compositor; the visual artifacts still appear.