---

yaml
---
r: 184078
b: refs/heads/beta
c: 7412d1b
h: refs/heads/master
v: v3

Author: dotdash

[refs]

@@ -31,7 +31,7 @@ refs/heads/automation-fail: 1bf06495443584539b958873e04cc2f864ab10e4
 refs/heads/issue-18208-method-dispatch-3-quick-reject: 2009f85b9f99dedcec4404418eda9ddba90258a2
 refs/heads/batch: b7fd822592a4fb577552d93010c4a4e14f314346
 refs/heads/building: 126db549b038c84269a1e4fe46f051b2c15d6970
-refs/heads/beta: 52b5150cfd3dfcdf518675e9073f03e061a63a53
+refs/heads/beta: 7412d1b2eff1c77241c54fa39508e7049d71ec7e
 refs/heads/windistfix: 7608dbad651f02e837ed05eef3d74a6662a6e928
 refs/tags/1.0.0-alpha: e42bd6d93a1d3433c486200587f8f9e12590a4d7
 refs/heads/tmp: c65fb1a81e5dc58cf171cc47f65de9e6e2119247

branches/beta/src/libcollections/vec.rs

@@ -56,6 +56,7 @@ use core::cmp::{Ordering};
 use core::default::Default;
 use core::fmt;
 use core::hash::{self, Hash};
+use core::intrinsics::assume;
 use core::iter::{repeat, FromIterator, IntoIterator};
 use core::marker::{self, ContravariantLifetime, InvariantType};
 use core::mem;
@@ -1587,8 +1588,12 @@ impl<T> AsSlice<T> for Vec<T> {
     #[stable(feature = "rust1", since = "1.0.0")]
     fn as_slice(&self) -> &[T] {
         unsafe {
+            let p = *self.ptr;
+            if cfg!(not(stage0)) { // NOTE remove cfg after next snapshot
+                assume(p != 0 as *mut T);
+            }
             mem::transmute(RawSlice {
-                data: *self.ptr,
+                data: p,
                 len: self.len
             })
         }