Blit_rect throws error Condition "dsize == 0" is true

[max_godot]

Godot Version

4.2

Question

Found some instructions regarding blit here and tried it out: https://ask.godotengine.org/83298/how-create-new-image-inside-godot-from-fragments-other-images

My code is

func _ready():
	var img = Image.new()
	img.create(1200, 1200, false, Image.FORMAT_RGB8)
	var blitImage = Image.new()
	blitImage.load("res://avatar.jpg")
	img.blit_rect(blitImage, blitImage.get_used_rect(), Vector2(40, 40))
	img.save_jpg("res://avatar_blit.jpg")

but when I run it, it returns

E 0:00:00:0578   Node.gd:10 @ _ready(): Condition "dsize == 0" is true.
  <C++ Source>   core/io/image.cpp:2786 @ blit_rect()
  <Stack Trace>  Node.gd:10 @ _ready()

E 0:00:00:0578   Node.gd:11 @ _ready(): Condition "p_img.is_null() || p_img->is_empty()" is true. Returning: ERR_INVALID_PARAMETER
  <C++ Source>   modules/jpg/image_loader_jpegd.cpp:158 @ _jpgd_save_to_output_stream()
  <Stack Trace>  Node.gd:11 @ _ready()

I have already checked, according to the Godot inspector the avatar.jpg is of format RGB8 so that can be ruled out as issue.
What am I missing here?

You can find the complete project here for reference:
https://www.dropbox.com/scl/fi/iglu4lu96gq8uksy2mljq/blit.zip?rlkey=yj95vki9xelmkqrldevkh3kl4&dl=0

[shatteredreality]

Hi, you need to save the return value of Image.create().

	img = img.create(1200, 1200, false, Image.FORMAT_RGB8)

[max_godot]

@shatteredreality thanks, I missed that in the documentation.