Kernrechtsfrage
Whether Y.'s testament was wholly void because it disposed of assets subject to a substitutionary inheritance
Extrahierter Entscheid
The testament was not wholly invalid; at most it could be partially invalid insofar as it infringed the substitute heirs' rights, and X lacked standing to invoke that.
Extrahierte Begründung
A testator may burden a prior heir with an obligation to deliver the estate to substitute heirs. Since not the whole estate was subject to the substitution and the challenged dispositions also concerned unencumbered assets, the will did not contain an impossible content as a whole. Any invalidity would concern only the substitute heirs' rights, which they must assert themselves.