Panic "Image index out of bounds" in ImageBuffer::get_pixel()

[Shnatsel]

The following GIF images trigger a panic in ImageBuffer::get_pixel() when decoded: gif-oob.zip

Code to reproduce the issue is exactly the same as in #876. Found with AFL.rs, tested on git commit 865d2fc

[fintelia]

I think this may be resolved? I tried running the code below and didn't see any panics (I had to rename the files to ".gif" to make the open function work):

fn main() {
    println!("{:?}", image::open("17d85872e1bb51147e968648399c8e23fda23c63.gif").err());
    println!("{:?}", image::open("2b6bf5f87834ff9c8962a0f0229404b4b8a7cae5.gif").err());
}

[Shnatsel]

The exact code to reproduce the issue is listed in #876, please try that.

[fintelia]

I still wasn't able to reproduce this issue. I was however able to reproduce issue #877 which uses the same code, I'll post my findings about that in a bit

[Shnatsel]

As soon as all the known panics in GIF decoder are fixed or found not reproducible, I'll re-run the fuzzer and it will probably find several more.

[HeroicKatora]

Can't reproduce this one as well, closing.