====== Docker X-compile libc-bin segfault ======
===== Overview =====
In many of my docker containers, I use Ubuntu images as the base image.  Additionally, I usually run an ''apt update'' and ''apt upgrade'' in the build steps of my container.  At one point, the builds would fail with something to this effect when x-compiling for ARM (Raspberry PI):

<code>
51.42 Unpacking libc-bin (2.35-0ubuntu3.8) over (2.35-0ubuntu3.7) ...
51.89 Setting up libc-bin (2.35-0ubuntu3.8) ...                                 
52.23 Segmentation fault (core dumped)
52.40 Segmentation fault (core dumped)
52.41 dpkg: error processing package libc-bin (--configure):                    
52.41  installed libc-bin package post-installation script subprocess returned e
rror exit status 139          
52.45 Errors were encountered while processing:
52.45  libc-bin    
52.56 E: Sub-process /usr/bin/dpkg returned an error code (1)
</code>

This turns out to be an issue QEMU on my linux box that I'm building these on.  Now, on to the fix.

===== The Fix =====
At this point, I just added a function to my bashrc file to just fix this where it happens.

<code bash>
function fix_docker_build() {
    # If there are errors processing libc-bin, run this
    # from https://t.brk.io/6A
    docker pull tonistiigi/binfmt:latest
    docker run --privileged --rm tonistiigi/binfmt --uninstall qemu-*
    docker run --privileged --rm tonistiigi/binfmt --install all
}
</code>

You can run the individual commands or just add this to your bashrc file (and ''source ~/.bashrc'') and then just run ''fix_docker_build'' anytime later.