error[E0080]: evaluation of constant value failed --> $DIR/detect-extra-ub.rs:9:20 | LL | let _x: bool = transmute(3u8); | ^^^^^^^^^^^^^^ constructing invalid value: encountered 0x03, but expected a boolean error[E0080]: evaluation of constant value failed --> $DIR/detect-extra-ub.rs:15:21 | LL | let _x: usize = transmute(&3u8); | ^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes | = help: this code performed an operation that depends on the underlying bytes representing a pointer = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error[E0080]: evaluation of constant value failed --> $DIR/detect-extra-ub.rs:21:30 | LL | let _x: (usize, usize) = transmute(x); | ^^^^^^^^^^^^ unable to turn pointer into raw bytes | = help: this code performed an operation that depends on the underlying bytes representing a pointer = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error[E0080]: evaluation of constant value failed --> $DIR/detect-extra-ub.rs:26:20 | LL | let _x: &u32 = transmute(&[0u8; 4]); | ^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered an unaligned reference (required 4 byte alignment but found 1) error[E0080]: evaluation of constant value failed --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL | LL | copy_nonoverlapping(src, tmp.as_mut_ptr(), 1); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ accessing memory with alignment 1, but alignment 4 is required | note: inside `std::ptr::read::` --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL | LL | copy_nonoverlapping(src, tmp.as_mut_ptr(), 1); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ note: inside `ptr::const_ptr::::read` --> $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL | LL | unsafe { read(self) } | ^^^^^^^^^^ note: inside `INNER` --> $DIR/detect-extra-ub.rs:38:9 | LL | ptr.read(); | ^^^^^^^^^^ note: erroneous constant used --> $DIR/detect-extra-ub.rs:32:5 | LL | INNER; | ^^^^^ error: aborting due to 5 previous errors For more information about this error, try `rustc --explain E0080`.