use new_unchecked

Author: Vanille-N

tests/fail/tree_borrows/unique.rs

@@ -14,7 +14,7 @@ fn main() {
     let refmut = &mut data;
     let rawptr = refmut as *mut u8;
 
-    let uniq = Unique::new(rawptr).unwrap();
+    let uniq = Unique::new_unchecked(rawptr);
     unsafe {
         *uniq.as_ptr() = 1; // activation
         let _maybe_parent = *rawptr; // maybe becomes Frozen

tests/pass/tree_borrows/unique.rs

@@ -23,7 +23,7 @@ fn main() {
 
         // We create a Unique and expect it to have a fresh tag
         // and uninitialized permissions.
-        let uniq = Unique::new(raw).unwrap();
+        let uniq = Unique::new_unchecked(raw);
         name!(uniq.as_ptr(), "uniq");
         print_state!(alloc_id);