app closes incorrectly sometimes

[MrLixam]

Steps to reproduce the bug

1. Download the most recent arch package for piskel
2. open the app via a terminal
3. create a new frame, draw a pixel on this frame, then undo the pixel, then close the app without saving (this happens about 50% of the time, I haven't pinpointed the exact cause of this)
4. the following error message appears often -> "Assertion 'close_nointr(fd) != -EBADF' failed at src/basic/fd-util.c:75, function safe_close(). Aborting. [1] 69571 IOT instruction (core dumped) piskel"

Environment details

• operating system: endeavourOS 6.7.0-arch3-1 up to date as of 01/23/24
• browser (or offline application version): latest package release as of 01/23/24