Iceman

@swift-5.2.5 @swift-5.5.3 -enable-library-evolution @usableFromInline struct S { @usableFromInline var v: [Int] @inlinable init() { self.v = [] } } (edited)

exit status: 1 with stderr:

<stdin>:8:12: error: 'self' used before 'self.init' call or assignment to 'self' self.v = [] ^ <stdin>:9:3: error: 'self.init' isn't called on all paths before returning from initializer } ^