Decoding gif failure

[Adonis-Song]

Hello. I want to use stbi decode gif. These is my code.

STBIDEF stbi_uc *stbi_load_gif(char const *filename, int **delays, int *width, int *height, int *frames, int *nrChannels, int req_comp) 
{
    FILE *f = stbi__fopen(filename, "rb");
    unsigned char *result;
    if (!f) return stbi__errpuc("can't fopen", "Unable to open file");
    fseek(f, 0, SEEK_END);
    int bufSize = ftell(f);
    unsigned char *buf = (unsigned char *)malloc(sizeof(unsigned char) * bufSize);
    if (buf) 
    {
        fseek(f, 0, SEEK_SET);
        fread(buf, 1, bufSize, f);
        result = stbi_load_gif_from_memory(buf, bufSize, delays, width, height, frames, nrChannels, req_comp);
        free(buf);
        buf = NULL;
    }
    else 
    {
        result = stbi__errpuc("outofmem", "Out of memory");
    }
    fclose(f);
    return result;
}

I find some gif files could be decoded successfully but some failed.
After debug code, I find all failed cases are caused by the this cases being triggered during lzw decoding.

I find ffmpeg could decodecd all gif file successfully andIt will not return directly in the case above.

So is this a stbi bug?

This is a test file which will be decoded failed by stbi
test.zip

[nothings]

I mean, it could be a bug in stbi, but more likely it's the encoder violating the spec. See for example #1222 (comment)

[Adonis-Song]

Thank you very much for your reply！