| #![feature(const_refs_to_cell)] |
| |
| use std::cell::*; |
| |
| struct SyncPtr<T> { x : *const T } |
| unsafe impl<T> Sync for SyncPtr<T> {} |
| |
| // These pass the lifetime checks because of the "tail expression" / "outer scope" rule. |
| // (This relies on `SyncPtr` being a curly brace struct.) |
| // However, we intern the inner memory as read-only. |
| // The resulting constant would pass all validation checks, so it is crucial that this gets rejected |
| // by static const checks! |
| static RAW_SYNC_S: SyncPtr<Cell<i32>> = SyncPtr { x: &Cell::new(42) }; |
| //~^ ERROR: cannot refer to interior mutable data |
| const RAW_SYNC_C: SyncPtr<Cell<i32>> = SyncPtr { x: &Cell::new(42) }; |
| //~^ ERROR: cannot refer to interior mutable data |
| |
| fn main() {} |
