Opening color picker or Sprite2D UV dialog hangs the editor

[anniryynanen]

Tested versions

I bisected it, first affected commit is 9fb9660.

System information

Windows 11, local dev build from master

Issue description

When I open a color picker anywhere in the editor, the editor hangs and has to be closed by force.

Steps to reproduce

Open a project in the editor and try to select a color anywhere using the color picker. I tested the inspector and project settings and both reproduce this.

Minimal reproduction project (MRP)

N/A

[wpbirney]

Same here on void linux, reverting 9fb9660 fixes it for now

[aaronp64]

I'm seeing the same on Windows 10/latest master. If I leave it running long enough, I get a bunch of the messages below printed out:

Failed method: CanvasItem::_redraw_callback. Message queue out of memory. Message queue out of memory. Try increasing 'memory/limits/message_queue/max_size_mb' in project settings.
Object was deleted while awaiting a callback.
Object was deleted while awaiting a callback.
Object was deleted while awaiting a callback.
Object was deleted while awaiting a callback.
Object was deleted while awaiting a callback.
...

Also saw EditorNode::_print_handler_impl instead of CanvasItem::_redraw_callback