Description

The version of perl included in the current Flatcar development container was compiled wrong, and will immediately segfault under certain condition. This is actually a really old issue from CoreOS (coreos/bugs#2369), that was originally ignored, and has just been noticed and fixed in upstream not long ago (Perl/perl5#18739). This issue might be caused by the same problem: #307. Interestingly, a simple echo 'print("Hello, World!\n");' | perl is indeed not enough to trigger the segfault.

Impact

I'm trying to automate the build of zfs for Flatcar, and having to patch and rebuild perl every time is a bit of a pain. (https://github.com/lorenz/torcx-zfs/blob/cb9ad1fef25cda4dcb18935883151113af2f791d/build.sh#L13-L15)

Environment and steps to reproduce

1. Enter development container with systemd-nspawn, as usual.
2. Run perl -V
3. Observe segfault.

Attempt to free unreferenced scalar: SV 0x55f7886da390 at /usr/lib64/perl5/5.26.2/strict.pm line 38.
Segmentation fault