The testsuite for stunnel-5.56 deadlocks after busybox upgrade from 1.32.1->1.32.0. I have bisected it to this commmit: commit 47eb979404735b9528538968cb5eaac7355a0c5a (HEAD, refs/bisect/bad) Author: Denys Vlasenko <vda.linux@googlemail.com> Date: Tue Feb 18 15:37:43 2020 +0100 ash: jobs: Only clear gotsigchld when waiting for everything I have also confirmed that reverting that commit solves the deadlock. To reproduce: * fetch https://www.stunnel.org/downloads/archive/5.x/stunnel-5.56.tar.gz * build it from source. * run make check with busybox ash (/bin/sh can be edited in tests/make_test)
This was fixed in 1.32.1