---

yaml
---
r: 209618
b: refs/heads/try
c: 744085e
h: refs/heads/master
v: v3

Author: graydon

[refs]

@@ -2,7 +2,7 @@
 refs/heads/master: 3e561f05c00cd180ec02db4ccab2840a4aba93d2
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: ba0e1cd8147d452c356aacb29fb87568ca26f111
-refs/heads/try: f5b296310320a49897e05112f8fb739d55cdf695
+refs/heads/try: 744085ed1dad34a865a78b57ecdbb2849a7b1b87
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596

branches/try/src/doc/reference.md

@@ -3842,8 +3842,10 @@ is to be destroyed.
 # Memory model
 
 A Rust program's memory consists of a static set of *items* and a *heap*.
-Immutable portions of the heap may be shared between threads, mutable portions
-may not.
+Immutable portions of the heap may be safely shared between threads, mutable
+portions may not be safely shared, but several mechanisms for effectively-safe
+sharing of mutable values, built on unsafe code but enforcing a safe locking
+discipline, exist in the standard library.
 
 Allocations in the stack consist of *variables*, and allocations in the heap
 consist of *boxes*.