Comment # 5 on bug 1221763 from Tom de Vries

I can confirm this.

I booted into tumbleweed, and looked at the value of
/proc/sys/kernel/yama/ptrace_scope.  It was 0.

Then I did zypper dup, and it changed to 1.  Same after a reboot.

I worked around this by adding "kernel.yama.ptrace_scope = 1" in
/etc/sysctl.conf.