error:
main.swift:8:26: warning: will never be executed let hoge: CustomString = "fuga" ^ main.swift:8:26: note: a call to a never-returning function let hoge: CustomString = "fuga" ^ main.swift:4:14: warning: will never be executed self = "hoge" ^ main.swift:4:16: note: a call to a never-returning function self = "hoge" ^ main.swift:3:5: warning: will never be executed init(stringLiteral value: StringLiteralType) { ^ main.swift:3:5: note: a call to a never-returning function init(stringLiteral value: StringLiteralType) { ^ 0 swift 0x0000000003ae91b8 1 swift 0x0000000003ae98f6 2 libpthread.so.0 0x00007f6a35029390 3 libpthread.so.0 0x00007f6a35458058 4 libpthread.so.0 0x00007f6a3545809a 5 libpthread.so.0 0x00007f6a3545809a 6 libpthread.so.0 0x00007f6a3545809a 7 libpthread.so.0 0x00007f6a3545809a 8 libpthread.so.0 0x00007f6a3545809a 9 libpthread.so.0 0x00007f6a3545809a 10 libpthread.so.0 0x00007f6a3545809a 11 libpthread.so.0 0x00007f6a3545809a 12 libpthread.so.0 0x00007f6a3545809a 13 libpthread.so.0 0x00007f6a3545809a 14 libpthread.so.0 0x00007f6a3545809a 15 libpthread.so.0 0x00007f6a3545809a 16 libpthread.so.0 0x00007f6a3545809a 17 libpthread.so.0 0x00007f6a3545809a 18 libpthread.so.0 0x00007f6a3545809a 19 libpthread.so.0 0x00007f6a3545809a 20 libpthread.so.0 0x00007f6a3545809a 21 libpthread.so.0 0x00007f6a3545809a 22 libpthread.so.0 0x00007f6a3545809a 23 libpthread.so.0 0x00007f6a3545809a 24 libpthread.so.0 0x00007f6a3545809a 25 libpthread.so.0 0x00007f6a3545809a 26 libpthread.so.0 0x00007f6a3545809a 27 libpthread.so.0 0x00007f6a3545809a 28 libpthread.so.0 0x00007f6a3545809a 29 libpthread.so.0 0x00007f6a3545809a 30 libpthread.so.0 0x00007f6a3545809a 31 libpthread.so.0 0x00007f6a3545809a 32 libpthread.so.0 0x00007f6a3545809a 33 libpthread.so.0 0x00007f6a3545809a 34 libpthread.so.0 0x0000