error[E0512]: cannot transmute between types of different sizes, or dependently-sized types --> $DIR/issue-112505-overflow.rs:4:14 | LL | unsafe { std::mem::transmute(v) } | ^^^^^^^^^^^^^^^^^^^ | = note: source type: `[[[u32; 8888888]; 9999999]; 777777777]` (values of the type `[[[u32; 8888888]; 9999999]; 777777777]` are too big for the current architecture) = note: target type: `[[[u32; 9999999]; 777777777]; 239]` (59484438436515561504 bits) error: aborting due to previous error For more information about this error, try `rustc --explain E0512`.