error[E0080]: evaluation of constant value failed
  --> $DIR/transmute-size-mismatch.rs:22:35
   |
LL | const FROM_BIGGER: u16 = unsafe { mir_transmute(123_i32) };
   |                                   ^^^^^^^^^^^^^^^^^^^^^^ transmuting from 4-byte type to 2-byte type: `i32` -> `u16`
   |
note: inside `mir_transmute::<i32, u16>`
  --> $DIR/transmute-size-mismatch.rs:12:13
   |
LL |             RET = CastTransmute(x);
   |             ^^^^^^^^^^^^^^^^^^^^^^ the failure occurred here

error[E0080]: evaluation of constant value failed
  --> $DIR/transmute-size-mismatch.rs:25:36
   |
LL | const FROM_SMALLER: u32 = unsafe { mir_transmute(123_i16) };
   |                                    ^^^^^^^^^^^^^^^^^^^^^^ transmuting from 2-byte type to 4-byte type: `i16` -> `u32`
   |
note: inside `mir_transmute::<i16, u32>`
  --> $DIR/transmute-size-mismatch.rs:12:13
   |
LL |             RET = CastTransmute(x);
   |             ^^^^^^^^^^^^^^^^^^^^^^ the failure occurred here

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0080`.