exit status: 1 with stderr:
<stdin>:3:21: error: return type of property 'p' requires that 'A' conform to 'P' var p: some P = A() ^ <stdin>:3:12: note: opaque return type declared here var p: some P = A() ^~~~~~ <stdin>:3:9: error: property declares an opaque return type, but cannot infer the underlying type from its initializer expression var p: some P = A() ^