Xpra: Ticket #1992: html5 scroll paint error

Seen this in the logs, not sure how to reproduce it:

2018-10-11 12:10:24,516  TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)'
Client.js:1 error painting scroll TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)'
    at XpraWindow.do_paint (Window.js:1)
    at XpraWindow.may_paint_now (Window.js:1)
    at XpraWindow.paint (Window.js:1)
    at XpraClient._process_draw_queue (Client.js:2)
    at XpraClient._process_draw (Client.js:2)
    at XpraProtocolWorkerHost.XpraClient._route_packet [as packet_handler] (Client.js:1)
    at Worker.<anonymous> (Protocol.js:1)
XpraClient.error @ Client.js:1
XpraWindow.error @ Window.js:1
paint_error @ Window.js:1
XpraWindow.do_paint @ Window.js:1
XpraWindow.may_paint_now @ Window.js:1
XpraWindow.paint @ Window.js:1
XpraClient._process_draw_queue @ Client.js:2
XpraClient._process_draw @ Client.js:2
XpraClient._route_packet @ Client.js:1
(anonymous) @ Protocol.js:1
Client.js:1 error painting scroll TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)'
    at XpraWindow.do_paint (Window.js:1)
    at XpraWindow.may_paint_now (Window.js:1)
    at Image.j.onload (Window.js:1)


Thu, 29 Nov 2018 08:06:40 GMT - Antoine Martin: status changed; resolution set

Not seen again... Though it could explain #2053.


Sat, 23 Jan 2021 05:39:14 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1992