1 error[E0658]: casting pointers to integers in constants is unstable
2 --> $DIR/match-test-ptr-null.rs:6:15
4 LL | match &1 as *const i32 as usize {
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^
7 = note: see issue #51910 <https://github.com/rust-lang/rust/issues/51910> for more information
8 = help: add `#![feature(const_raw_ptr_to_usize_cast)]` to the crate attributes to enable
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0658`.