doc: describe change to eliminate method expression wrappers from stack traces
Change-Id: I824b42a1c1fdcee8712681ffc6316470761be065
Reviewed-on: https://go-review.googlesource.com/c/159858
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/doc/go1.12.html b/doc/go1.12.html
index dddf44b..c34b473 100644
--- a/doc/go1.12.html
+++ b/doc/go1.12.html
@@ -232,6 +232,23 @@
</pre>
</p>
+<p><!-- CL 153477 -->
+ Wrappers generated by the compiler to implement method expressions
+ are no longer reported
+ by <a href="/pkg/runtime/#CallersFrames"><code>runtime.CallersFrames</code></a>
+ and <a href="/pkg/runtime/#Stack"><code>runtime.Stack</code></a>. They
+ are also not printed in panic stack traces.
+
+ This change aligns the <code>gc</code> toolchain to match
+ the <code>gccgo</code> toolchain, which already elided such wrappers
+ from stack traces.
+
+ Clients of these APIs might need to adjust for the missing
+ frames. For code that must interoperate between 1.11 and 1.12
+ releases, you can replace the method expression <code>x.M</code>
+ with the function literal <code>func (...) { x.M(...) } </code>.
+</p>
+
<p><!-- CL 144340 -->
The compiler now accepts a <code>-lang</code> flag to set the Go language
version to use. For example, <code>-lang=go1.8</code> causes the compiler to
