Segmentation fault: 11 (´・ω・｀)？ #swift #CodePiece

CodePiece.swift

// objc
@interface ObjcClass<T> : NSObject
@property(nonnull) T property;
@end

// swift
protocol ContainGenericType {
    associatedtype T
    var property: T { get }
}

extension ObjcClass: ContainGenericType {}