Tilemap cel image saveAs call leads to segmentation fault.

[zarstensen]

Issue

When calling Image:SaveAs() on a image from a cel in a tilemap, a segmentation fault happens which leads to the app exiting.

Reproduce

Run a script with the following code snippet with the attached aseprite file open, and observe the app crash.

app.sprite.layers[1].cels[1].image:saveAs("image.png")

Aseprite and System version

• Aseprite version: 1.3-rc6-x64 and commit 19b54ff
• System: Windows 10.0.19045

[dacap]

Thanks @zarstensen, I was able to reproduce it.

This case is interesting because a tilemap layer cel is an image with indexes/references to the tileset, but I think that the expected behavior would be to save an image of the rendered tilemap as it looks in the canvas (instead of the tilemap data/indexes as an indexed image).