unsafe: document that unsafe programs are not protected
The compatibility guideline needs to be clear about this even
though it means adding a clause that was not there from the
beginning. It has always been understood, so this isn't really
a change in policy, just in its expression.
LGTM=bradfitz, gri, rsc
R=golang-codereviews, bradfitz, gri, rsc
CC=golang-codereviews
https://golang.org/cl/162060043
diff --git a/doc/go1compat.html b/doc/go1compat.html
index 04a6c11..94c48d2 100644
--- a/doc/go1compat.html
+++ b/doc/go1compat.html
@@ -104,6 +104,14 @@
to compile in future releases.
</li>
+<li>
+Use of package <code>unsafe</code>. Packages that import
+<a href="/pkg/unsafe/"><code>unsafe</code></a>
+may depend on internal properties of the Go implementation.
+We reserve the right to make changes to the implementation
+that may break such programs.
+</li>
+
</ul>
<p>
