Memory leak in editor when pressing "Tiles" button

[Frostwithasideofsalt]

When you press the tiles button in the editor, sometimes supertux will freeze up, and will cause the game to use all of the remaining ram. the game is unable to be closed, and can only be closed through the task manager.

Some other notable things about this. ~~-to my recollection, this has only happened when using a custom tileset file. I could be misremembering though.~~ -This has only happened when using the eraser tool when hitting the tiles button. -I use windows 10.