Package: unison2.40.102 Version: 2.40.102-3+b1 Followup-For: Bug #807019 I can confirm this bug report. Trying to run unison-2.40 under gdb I get this message:
Starting program: /usr/bin/unison-2.40 r Program received signal SIGSEGV, Segmentation fault. 0x000000000040ee11 in ?? () -- System Information: Debian Release: stretch/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 4.2.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=it_IT.utf8, LC_CTYPE=it_IT.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages unison2.40.102 depends on: ii libc6 2.21-3 Versions of packages unison2.40.102 recommends: ii openssh-client [ssh-client] 1:7.1p1-1 Versions of packages unison2.40.102 suggests: ii unison-all 2.48+1 -- no debconf information