crash while decompressing with multiple threads

[John Little]

lrzip fails with segmentation fault near the end of decompressing. Ubuntu 19.10, APT reports the version of lrzip is 0.631+git180528-1. A workaround is to use -p1, one thread only, but that is very slow.

It appears to me to match this issue on https://github.com/ckolivas/lrzip/issues/122. I built from that github project and the crash does not occur. So, I hope raising a bug here to suggest getting a later version from upstream is appropriate.