Assertion failed on ZopfliCalculateBitLengths at zopfli/src/zopfli/tree.c:100

[ljmf00]

I'm using pigz to compress a qcow2 QEMU QCOW2 Image (v3) file which happens to be very huge. I can't share the file because it might contain sensitive information I don't want to disclose here. The file size is 42949672960 bytes.

pigz: zopfli/src/zopfli/tree.c:100: ZopfliCalculateBitLengths: Assertion `!error' failed.
Aborted (core dumped)

Obviously, a stack-trace would be a lot beneficial here, but it happens to be very slow on my personal machine, although, I can manage to run it on a local server, if it is really required.