Comment # 10 on bug 1160171 from Stefan Br�ns

The requested symbol (YAML::detail::node_data::empty_scalar[abi:cxx11]()) was
added in yaml-cpp-0.6.3, which does not break ABI, only removing it would.

Unfortunately, we have no ABI tracking in openSUSE, and the library versioning
dependencies are only weak.

For Tumbleweed, we explicitly request people always use "zypper dup", but even
that does not ensure a consistent system when using e.g. "zypper in foo" - some
dependencies may be old, but are yet satisfied. Only "zypper in foo; zypper
dup" is sufficient is most cases.