Question juridique clé
Whether the cantonal court violated the disposition maxim by declaring part of the claim moot after the share transfer became impossible.
Solution extraite
No. The court could take account of an objective supervening event that rendered the requested exchange performance impossible and therefore moot.
Motifs extraits
Mootness can arise from circumstances independent of the parties' will; because the relevant share transfer could no longer be enforced, the court did not overstep the parties' pleadings.