A new bug fix release (v4.0.2) is now available: http://proot.me/#downloads
+ Fix how the very first program is launched by PRoot. Previously, argv was not preserved when the very first program was launched through a symbolic link. This old behavior used to bug programs like Busybox and python-exec. Thanks to "hhm", Ivailo "fluxer" Monev, and Joakim Tjernlund for the bug reports.
+ Fix renameat(2) sysexit support. There was a bug in PRoot that was exposed by the Aarch64 (a.k.a arm64) port only but that might affect other architectures.
+ Fix build for AArch64. Thanks to Rémi Duraffort for the patches and for the Debian/arm64 testing platform.
+ Fix support for "long" socket paths. These can only be 108 bytes long; this limit might be easily reached with PRoot since the path to the rootfs is always prepended. The solution was to automatically bind this long path to a shorter path. This bug was exposed by LibreOffice and Yocto's pseudo. Thanks to Christophe Guillon for the bug report.