Make all non-user-creatable structures non-comparable (#802)

This change makes all non-user-creatable structures non-comparable. This
makes it easier to add changes later that don't introduce breaking
changes from the go compatibility guarantees perspective.

This, of course, implies that this change _is_ a breaking change, but since
these structures are not intended to be created by users (or de-referenced),
it should be okay.

1 files changed, 1 insertions, 0 deletions

diff --git a/handles.go b/handles.go
index c0d4b3c..36ca1f0 100644
--- a/handles.go
+++ b/handles.go
@@ -11,6 +11,7 @@ import (
 )
 
 type HandleList struct {
+	doNotCompare
 	sync.RWMutex
 	// stores the Go pointers
 	handles map[unsafe.Pointer]interface{}