Error code E0512

Transmute with two differently sized types was attempted.

Erroneous code example:

fn takes_u8(_: u8) {} fn main() { unsafe { takes_u8(::std::mem::transmute(0u16)); } // error: cannot transmute between types of different sizes, // or dependently-sized types }

Please use types with same size or use the expected type directly. Example:

fn takes_u8(_: u8) {} fn main() { unsafe { takes_u8(::std::mem::transmute(0i8)); } // ok! // or: unsafe { takes_u8(0u8); } // ok! }