Uncaught RuntimeError: abort(OOM)

**Describe the bug**
A clear and concise description of what the bug is.
```
pthread sent an error! blob:http://localhost:8000/73a709bf-5aad-42ad-9d99-c65f6a3bfc09:1: Uncaught RuntimeError: abort(OOM). Build with -s ASSERTIONS=1 for more info.
```

**To Reproduce**
Steps to reproduce the behavior:
As soon as I added the `-ignore_loop 0` option, it just errors out.

```
-ignore_loop 0 -i Grape.gif -i juice.gif -filter_complex [1:v]overlay=format=auto,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse preview.gif
```

**Expected behavior**
A clear and concise description of what you expected to happen.
Not to run out of memory.

**Desktop (please complete the following information):**
- OS: [e.g. iOS] MacOS
- Browser [e.g. chrome, safari] Chrome
- Version [e.g. 22] 99.0.4844.84